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Home > Data > Databases > Guide to NoSQL with Azure Cosmos DB
Guide to NoSQL with Azure Cosmos DB
Guide to NoSQL with Azure Cosmos DB

Guide to NoSQL with Azure Cosmos DB: Work with the massively scalable Azure database service with JSON, C#, LINQ, and .NET Core 2

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Guide to NoSQL with Azure Cosmos DB

Getting Started with Cosmos DB Development and NoSQL Document Databases

n this chapter, we will provision a Cosmos DB account that uses the SQL API and we will start working with a document database, its collections, and documents. We will work with Cosmos DB on Azure and we will also learn how to work with the Azure Cosmos DB Emulator. We will work with different tools to interact with our Cosmos DB document database that will be extremely useful for our common development tasks. We will do the following:

  • Understand URIs, read-write and read-only keys, and connection strings
  • Create a new document database with the SQL API
  • Create a new collection
  • Populate a collection with documents
  • Understand automatically generated key-value pairs
  • Understand schema-agnostic features
  • Work with the web-based Azure Cosmos DB Explorer
  • Use Azure Storage Explorer to interact with Cosmos DB databases...

Provisioning a Cosmos DB account that uses the SQL API

In Chapter 1, Introduction to NoSQL in Cosmos DB, we learned about the different elements of the Cosmos DB resource model. Now we will use the web-based Azure portal to provision a Cosmos DB account with the SQL API. Then, we will create a document database, generate a collection for this database, and populate the collection with many JSON documents.

In order to follow the next steps, you have the following three options:

  • Work with an already active Azure account
  • Sign up for a new Azure account
  • Use the limited-time try Cosmos DB for free feature
If you want to work with an already active Azure account, you have to take into account that you will spend credits and, based on your free resources or credits, you can end up being billed for the storage, request units, and bandwidth consumed.

If you don't have an active...

Understanding URIs, read-write and read-only keys, and connection strings

After you create a new Cosmos DB account, you will see the Quick start panel. However, the next time you sign in to the Azure portal, you won't see this panel. So, we will follow the necessary steps to access the recently created Cosmos DB account panel, considering we signed out and then signed in to the portal again:

  1. Click Azure Cosmos DB in the left-hand panel. The portal will display a list with all the Cosmos DB accounts, their statuses, locations, and the subscription to which they belong. Note that if you have multiple Azure subscriptions, the list will include only the accounts for the selected subscription. Make sure you select the subscription with which you have created the account. The following screenshot shows a sample list that includes the example001 Cosmos DB account:

  1. Click...

Creating a new document database with the SQL API

We have a Cosmos DB account that works with the SQL API but we still don't have a database. Now we will continue working with the Azure web-based portal and we will create a new document database in the previously created account. We must take into account that we can use other tools, which we will analyze later, to perform this task. It is also possible to automate the task through scripting and to create a new database by using one of the available SDKs. However, it is a good idea to learn how things work in the portal first:

  1. Make sure you are on the page for the Cosmos DB account in the portal. Click on the Data Explorer option on the left-hand side menu. The portal will display the Data Explorer panel, which will allow us to work with the databases for the current Cosmos DB account. In this case, the panel won't...

Creating a new collection

Now we will create a new collection for the database.

  1. Hover on the database name (Competition) and click on the ellipses at the right-hand side (...) to display a context menu, as shown in the next screenshot:

  1. Click on New Collection in the context menu. The Add Collection panel will appear.
  2. Enter VideoGames1 in Collection Id.
  3. Select Fixed (10 GB) in Storage capacity. This way, the maximum storage size for the collection will be 10 GB. In this case, we won't configure a partition key.
  4. Enter 1000 in Throughput (400 - 10,000 RU/s). This way, Azure will provision 1,000 request units per second for this collection. Note that based on the value we enter, the portal displays the estimated spend below this field.
  5. Click + Add unique key and a new textbox will be added below Unique keys. Enter /name in this textbox to specify that we want the name value...

Populating a collection with documents

Now we will populate the recently created collection with a few documents that represent games that were part of eSports competitions with specific tags, definitions for their levels, and the high score achievements. We will continue working with the Azure web-based portal, but we will learn to use other tools to perform the same task in the following sections.

Create a new JSON file with the following contents in your favorite text editor and save it in a temporary folder as videogame1_01.json. The following lines show the code that defines the game with its tags, levels, and high score achievements. The code file for the sample is included in the learning_cosmos_db_02_01 folder in the videogames/videogame1_01.json file:

{ 
    "id": "1", 
    "name": "Battle Royale Kingdoms", 
    "lastCompetitionDate...

Understanding automatically generated key-value pairs

Scroll down to the latest lines of the document in the web-based editor and you will see new key-value pairs that were not part of the original document. The following screenshot shows the last lines in the embedded JSON editor:

The following lines show an example of the new key-value pairs. Note that many values will be different in your case:

    "_rid": "prUNAKtPjRoFAAAAAAAAAA==", 
    "_self": "dbs/prUNAA==/colls/prUNAKtPjRo=/docs/prUNAKtPjRoFAAAAAAAAAA==/", 
    "_etag": "\"22007fea-0000-0000-0000-5b86dbd60000\"", 
    "_attachments": "attachments/", 
    "_ts": 1535564758 
}

Cosmos DB added the following keys to our document, which start with an underscore (_) as a prefix and contain system-generated values for the document...

Understanding schema-agnostic features

Now we will add another document to the same collection. In this case, the new document will have new keys that didn't exist in the previously inserted document.

Create a new JSON file with the following contents in your favorite text editor and save it in a temporary folder as videogame1_02.json. The following lines show the code that defines a new game with its tags, levels, high score achievements, and prizes. The code file for the sample is included in the learning_cosmos_db_02_01 folder in the videogames/videogame1_02.json file:

{ 
    "id": "2", 
    "name": "Fortnite vs Zombies", 
    "lastCompetitionDate": "2018-09-30T03:31:20.7251173Z", 
    "tags": [ 
        "3D", "battle royale", "monsters", "shooter" 
    ], 
  ...

Provisioning a Cosmos DB account that uses the SQL API

In Chapter 1, Introduction to NoSQL in Cosmos DB, we learned about the different elements of the Cosmos DB resource model. Now we will use the web-based Azure portal to provision a Cosmos DB account with the SQL API. Then, we will create a document database, generate a collection for this database, and populate the collection with many JSON documents.

In order to follow the next steps, you have the following three options:

  • Work with an already active Azure account
  • Sign up for a new Azure account
  • Use the limited-time try Cosmos DB for free feature

Note

If you want to work with an already active Azure account, you have to take into account that you will spend credits and, based on your free resources or credits, you can end up being billed for the storage, request units, and bandwidth consumed.

If you don't have an active Azure account, you can take advantage of the free $200 in Azure credits that you will receive to explore the services for...

Understanding URIs, read-write and read-only keys, and connection strings

After you create a new Cosmos DB account, you will see the Quick start panel. However, the next time you sign in to the Azure portal, you won't see this panel. So, we will follow the necessary steps to access the recently created Cosmos DB account panel, considering we signed out and then signed in to the portal again:

  1. Click Azure Cosmos DB in the left-hand panel. The portal will display a list with all the Cosmos DB accounts, their statuses, locations, and the subscription to which they belong. Note that if you have multiple Azure subscriptions, the list will include only the accounts for the selected subscription. Make sure you select the subscription with which you have created the account. The following screenshot shows a sample list that includes the example001 Cosmos DB account:

 

 

  1. Click on the name for the recently created Cosmos DB account (example001) and the portal will open the page for this account with a...

Creating a new document database with the SQL API

We have a Cosmos DB account that works with the SQL API but we still don't have a database. Now we will continue working with the Azure web-based portal and we will create a new document database in the previously created account. We must take into account that we can use other tools, which we will analyze later, to perform this task. It is also possible to automate the task through scripting and to create a new database by using one of the available SDKs. However, it is a good idea to learn how things work in the portal first:

  1. Make sure you are on the page for the Cosmos DB account in the portal. Click on the Data Explorer option on the left-hand side menu. The portal will display the Data Explorer panel, which will allow us to work with the databases for the current Cosmos DB account. In this case, the panel won't list any databases because we haven't created any yet.
  2. Click onNew Databasein the toolbar located at the top of the panel. The...

Creating a new collection

Now we will create a new collection for the database.

  1. Hover on the database name (Competition) and click on the ellipses at the right-hand side (...) to display a context menu, as shown in the next screenshot:
  1. Click on New Collection in the context menu. The Add Collection panel will appear.
  2. Enter VideoGames1 in Collection Id.
  3. Select Fixed (10 GB) in Storage capacity. This way, the maximum storage size for the collection will be 10 GB. In this case, we won't configure a partition key.
  4. Enter 1000 in Throughput (400 - 10,000 RU/s). This way, Azure will provision 1,000 request units per second for this collection. Note that based on the value we enter, the portal displays the estimated spend below this field.
  5. Click + Add unique key and a new textbox will be added below Unique keys. Enter /name in this textbox to specify that we want the name value to be unique per partition key. In this case, there is only one partition, and therefore, the data integrity layer will make...

Populating a collection with documents

Now we will populate the recently created collection with a few documents that represent games that were part of eSports competitions with specific tags, definitions for their levels, and the high score achievements. We will continue working with the Azure web-based portal, but we will learn to use other tools to perform the same task in the following sections.

 

Create a new JSON file with the following contents in your favorite text editor and save it in a temporary folder as videogame1_01.json. The following lines show the code that defines the game with its tags, levels, and high score achievements. The code file for the sample is included in the learning_cosmos_db_02_01 folder in the videogames/videogame1_01.json file:

{ 
    "id": "1", 
    "name": "Battle Royale Kingdoms", 
    "lastCompetitionDate": "2018-09-29T04:36:22.7251173Z", 
    "tags": [ 
        "mobile", "2D", "card game" 
    ], 
    "levels": [ 
        { 
            "title": "Training...
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Key benefits

  • Work with the latest available tools related to Cosmos DB
  • Learn to work with the latest version of the .NET Core SDK, C# and the SQL API
  • Work with a database service that doesn’t require you to use an ORM and provides flexibility

Description

Cosmos DB is a NoSQL database service included in Azure that is continuously adding new features and has quickly become one of the most innovative services found in Azure, targeting mission-critical applications at a global scale. This book starts off by showing you the main features of Cosmos DB, their supported NoSQL data models and the foundations of its scalable and distributed architecture. You will learn to work with the latest available tools that simplify your tasks with Cosmos DB and reduce development costs, such as the Data Explorer in the Azure portal, Microsoft Azure Storage Explorer, and the Cosmos DB Emulator. Next, move on to working with databases and document collections. We will use the tools to run schema agnostic queries against collections with the Cosmos DB SQL dialect and understand their results. Then, we will create a first version of an application that uses the latest .NET Core SDK to interact with Cosmos DB. Next, we will create a second version of the application that will take advantage of important features that the combination of C# and the .NET Core SDK provides, such as POCOs and LINQ queries. By the end of the book, you will be able to build an application that works with a Cosmos DB NoSQL document database with C#, the .NET Core SDK, LINQ, and JSON.

Who is this book for?

This book is for C# developers. You do not require any knowledge of Azure Cosmos DB, but familiarity with the Azure platform is expected.

What you will learn

  • Understand the supported NoSQL data models and the resource hierarchy
  • Learn the latest tools to work with Cosmos DB accounts and collections
  • Reduce your development costs by working with the Cosmos DB Emulator
  • Understand request units, automatic indexing, partitioning, and billing
  • Build an application with C#, Cosmos DB, .NET Core SDK, and the SQL API
  • Perform asynchronous operations with databases, and documents in C#
  • Work with models, and customize serialization of LINQ queries
Estimated delivery fee Deliver to Thailand

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Product Details

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Publication date, Length, Edition, Language, ISBN-13
Publication date : Sep 28, 2018
Length: 214 pages
Edition : 1st
Language : English
ISBN-13 : 9781789612899
Vendor :
Microsoft
Category :
Data
Languages :
C#
Concepts :
Databases
Tools :
.NET

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Product feature icon Paperback book shipped to your preferred address
Product feature icon Download this book in EPUB and PDF formats
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Product feature icon DRM FREE - Read whenever, wherever and however you want
Estimated delivery fee Deliver to Thailand

Standard delivery 10 - 13 business days

$8.95

Premium delivery 5 - 8 business days

$45.95
(Includes tracking information)

Product Details

Publication date : Sep 28, 2018
Length: 214 pages
Edition : 1st
Language : English
ISBN-13 : 9781789612899
Vendor :
Microsoft
Category :
Data
Languages :
C#
Concepts :
Databases
Tools :
.NET

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Table of Contents

8 Chapters
Introduction to NoSQL in Cosmos DB Chevron down icon Chevron up icon
Introduction to NoSQL in Cosmos DB
Making the paradigm shift to the NoSQL way
Learning about the main features of Cosmos DB
Understanding the supported NoSQL data models
Using the appropriate API for each data model
Diving deep into the Cosmos DB resource model
Understanding the system topology NoSQL
Learning about the resource hierarchy for each container
Test your knowledge
Summary
Getting Started with Cosmos DB Development and NoSQL Document Databases Chevron down icon Chevron up icon
Getting Started with Cosmos DB Development and NoSQL Document Databases
Provisioning a Cosmos DB account that uses the SQL API
Understanding URIs, read-write and read-only keys, and connection strings
Creating a new document database with the SQL API
Creating a new collection
Populating a collection with documents
Understanding automatically generated key-value pairs
Understanding schema-agnostic features
Working with the web-based Azure Cosmos DB Explorer
Using Azure Storage Explorer to interact with Cosmos DB databases
Working with the Azure Cosmos DB Emulator
Test your knowledge
Summary
Writing and Running Queries on NoSQL Document Databases Chevron down icon Chevron up icon
Writing and Running Queries on NoSQL Document Databases
Running queries against a collection with different tools
Understanding query results in JSON arrays
Checking the request units spent by a query
Working with schema-agnostic queries
Using built-in array functions
Working with joins
Using array iteration
Working with aggregate functions
Test your knowledge
Summary
Building an Application with C#, Cosmos DB, a NoSQL Document Database, and the SQL API Chevron down icon Chevron up icon
Building an Application with C#, Cosmos DB, a NoSQL Document Database, and the SQL API
Understanding the requirements for the first version of an application
Understanding the main classes of the Cosmos DB SDK for .NET Core
Creating a .NET Core 2 application to interact with Cosmos DB
Configuring a Cosmos DB client
Creating or retrieving a document database
Querying and creating document collections
Retrieving a document with an asynchronous query
Inserting documents that represent competitions
Calculating a cross-partition aggregate with an asynchronous query
Reading and updating an existing document with a dynamic object
Querying documents in multiple partitions
Calling asynchronous methods that create and query dynamic documents
 Test your knowledge
Summary
Working with POCOs, LINQ, and a NoSQL Document Database Chevron down icon Chevron up icon
Working with POCOs, LINQ, and a NoSQL Document Database
Creating models and customizing serialization
Retrieving a POCO with a LINQ asynchronous query
Inserting POCOs
Calculating a cross-partition aggregate with an asynchronous LINQ query
Reading and updating an existing document with a POCO
Querying documents in multiple partitions with LINQ
Writing LINQ queries that perform operations on arrays
Calling asynchronous methods that use POCOs to create and query documents
Inspecting the SQL API queries that LINQ generates
Test your knowledge
Summary
Tuning and Managing Scalability with Cosmos DB Chevron down icon Chevron up icon
Tuning and Managing Scalability with Cosmos DB
Understanding request units and how they affect billing
Dynamically adjusting throughput for a collection with the Azure portal
Working with client-side throughput management
Understanding rate limiting and throttling
Tracking consumed request units with client-side code
Understanding the options for provisioning request units
Learning portioning strategies
Deploying to multiple regions
Understanding the five consistency levels
Taking advantage of regional failover
Understanding indexing in Cosmos DB
Checking indexing policies for a collection with the Azure portal
Test your knowledge
Summary
Answers Chevron down icon Chevron up icon
Answers
Chapter 1: Introduction to NoSQL in Cosmos DB
Chapter 2: Getting Started with Cosmos DB Development and NoSQL Document Databases
Chapter 3: Writing and Running Queries on NoSQL Document Databases
Chapter 4: Building an Application with C#, Cosmos DB, a NoSQL Document Database, and the SQL API
Chapter 5: Working with POCOs, LINQ, and a NoSQL Document Database
Chapter 6: Tuning and Managing Scalability with Cosmos DB
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Customer reviews

Rating distribution
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(1 Ratings)
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rav Dec 06, 2023
Full star icon Full star icon Full star icon Full star icon Empty star icon 4
Some good information to get you started with Cosmos DB, though some of the information is a bit dated at this point.Check out Kramer in the Windows Store for a good Cosmos DB querying tool.
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About the authors

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Profile icon Gaston C. Hillar
Gaston C. Hillar
Gaston C. Hillar is Italian and has been working with computers since he was 8 years old. Gaston has a Bachelor's degree in computer science (graduated with honors) and an MBA. Currently, Gaston is an independent IT consultant and a freelance author who is always looking for new adventures anywhere in the world. He was a senior contributing editor at Dr. Dobb's, and has written more than a hundred articles on software development topics. He has received the prestigious Intel Black Belt Software Developer award eight times. He has written many articles about Java for Oracle Java Magazine. Gaston was also a former Microsoft MVP in technical computing. He lives with his wife, Vanesa, and his two sons, Kevin and Brandon.
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Profile icon Daron Yöndem
Daron Yöndem
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Daron Yöndem has been a Microsoft Regional Director and a Microsoft MVP for 11 years. He is a regular speaker at international conferences, recently focusing on microservices, serverless, DevOps, and IoT. Daron currently works as a CTO at XOMNI Inc, a cloud company that builds PaaS offerings for retailers, such as XOGO, who are building decision signage platform. Feel free to reach out to him on Twitter @daronyondem.
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What is the delivery time and cost of print book? Chevron down icon Chevron up icon

Shipping Details

USA:

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Economy: Delivery to most addresses in the US within 10-15 business days

Premium: Trackable Delivery to most addresses in the US within 3-8 business days

UK:

Economy: Delivery to most addresses in the U.K. within 7-9 business days.
Shipments are not trackable

Premium: Trackable delivery to most addresses in the U.K. within 3-4 business days!
Add one extra business day for deliveries to Northern Ireland and Scottish Highlands and islands

EU:

Premium: Trackable delivery to most EU destinations within 4-9 business days.

Australia:

Economy: Can deliver to P. O. Boxes and private residences.
Trackable service with delivery to addresses in Australia only.
Delivery time ranges from 7-9 business days for VIC and 8-10 business days for Interstate metro
Delivery time is up to 15 business days for remote areas of WA, NT & QLD.

Premium: Delivery to addresses in Australia only
Trackable delivery to most P. O. Boxes and private residences in Australia within 4-5 days based on the distance to a destination following dispatch.

India:

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Rest of the World:

Premium: Countries in the American continent: Trackable delivery to most countries within 4-7 business days

Asia:

Premium: Delivery to most Asian addresses within 5-9 business days

Disclaimer:
All orders received before 5 PM U.K time would start printing from the next business day. So the estimated delivery times start from the next day as well. Orders received after 5 PM U.K time (in our internal systems) on a business day or anytime on the weekend will begin printing the second to next business day. For example, an order placed at 11 AM today will begin printing tomorrow, whereas an order placed at 9 PM tonight will begin printing the day after tomorrow.


Unfortunately, due to several restrictions, we are unable to ship to the following countries:

  1. Afghanistan
  2. American Samoa
  3. Belarus
  4. Brunei Darussalam
  5. Central African Republic
  6. The Democratic Republic of Congo
  7. Eritrea
  8. Guinea-bissau
  9. Iran
  10. Lebanon
  11. Libiya Arab Jamahriya
  12. Somalia
  13. Sudan
  14. Russian Federation
  15. Syrian Arab Republic
  16. Ukraine
  17. Venezuela
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Customs duty are charges levied on goods when they cross international borders. It is a tax that is imposed on imported goods. These duties are charged by special authorities and bodies created by local governments and are meant to protect local industries, economies, and businesses.

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The orders shipped to the countries that are listed under EU27 will not bear custom charges. They are paid by Packt as part of the order.

List of EU27 countries: www.gov.uk/eu-eea:

A custom duty or localized taxes may be applicable on the shipment and would be charged by the recipient country outside of the EU27 which should be paid by the customer and these duties are not included in the shipping charges been charged on the order.

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The amount of duty payable varies greatly depending on the imported goods, the country of origin and several other factors like the total invoice amount or dimensions like weight, and other such criteria applicable in your country.

For example:

  • If you live in Mexico, and the declared value of your ordered items is over $ 50, for you to receive a package, you will have to pay additional import tax of 19% which will be $ 9.50 to the courier service.
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Cancellation Policy for Published Printed Books:

You can cancel any order within 1 hour of placing the order. Simply contact customercare@packt.com with your order details or payment transaction id. If your order has already started the shipment process, we will do our best to stop it. However, if it is already on the way to you then when you receive it, you can contact us at customercare@packt.com using the returns and refund process.

Please understand that Packt Publishing cannot provide refunds or cancel any order except for the cases described in our Return Policy (i.e. Packt Publishing agrees to replace your printed book because it arrives damaged or material defect in book), Packt Publishing will not accept returns.

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Return Policy:

We want you to be happy with your purchase from Packtpub.com. We will not hassle you with returning print books to us. If the print book you receive from us is incorrect, damaged, doesn't work or is unacceptably late, please contact Customer Relations Team on customercare@packt.com with the order number and issue details as explained below:

  1. If you ordered (eBook, Video or Print Book) incorrectly or accidentally, please contact Customer Relations Team on customercare@packt.com within one hour of placing the order and we will replace/refund you the item cost.
  2. Sadly, if your eBook or Video file is faulty or a fault occurs during the eBook or Video being made available to you, i.e. during download then you should contact Customer Relations Team within 14 days of purchase on customercare@packt.com who will be able to resolve this issue for you.
  3. You will have a choice of replacement or refund of the problem items.(damaged, defective or incorrect)
  4. Once Customer Care Team confirms that you will be refunded, you should receive the refund within 10 to 12 working days.
  5. If you are only requesting a refund of one book from a multiple order, then we will refund you the appropriate single item.
  6. Where the items were shipped under a free shipping offer, there will be no shipping costs to refund.

On the off chance your printed book arrives damaged, with book material defect, contact our Customer Relation Team on customercare@packt.com within 14 days of receipt of the book with appropriate evidence of damage and we will work with you to secure a replacement copy, if necessary. Please note that each printed book you order from us is individually made by Packt's professional book-printing partner which is on a print-on-demand basis.

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Currently, no tax is charged on the purchase of any print book (subject to change based on the laws and regulations). A localized VAT fee is charged only to our European and UK customers on eBooks, Video and subscriptions that they buy. GST is charged to Indian customers for eBooks and video purchases.

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You can pay with the following card types:

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What is the delivery time and cost of print books? Chevron down icon Chevron up icon

Shipping Details

USA:

'

Economy: Delivery to most addresses in the US within 10-15 business days

Premium: Trackable Delivery to most addresses in the US within 3-8 business days

UK:

Economy: Delivery to most addresses in the U.K. within 7-9 business days.
Shipments are not trackable

Premium: Trackable delivery to most addresses in the U.K. within 3-4 business days!
Add one extra business day for deliveries to Northern Ireland and Scottish Highlands and islands

EU:

Premium: Trackable delivery to most EU destinations within 4-9 business days.

Australia:

Economy: Can deliver to P. O. Boxes and private residences.
Trackable service with delivery to addresses in Australia only.
Delivery time ranges from 7-9 business days for VIC and 8-10 business days for Interstate metro
Delivery time is up to 15 business days for remote areas of WA, NT & QLD.

Premium: Delivery to addresses in Australia only
Trackable delivery to most P. O. Boxes and private residences in Australia within 4-5 days based on the distance to a destination following dispatch.

India:

Premium: Delivery to most Indian addresses within 5-6 business days

Rest of the World:

Premium: Countries in the American continent: Trackable delivery to most countries within 4-7 business days

Asia:

Premium: Delivery to most Asian addresses within 5-9 business days

Disclaimer:
All orders received before 5 PM U.K time would start printing from the next business day. So the estimated delivery times start from the next day as well. Orders received after 5 PM U.K time (in our internal systems) on a business day or anytime on the weekend will begin printing the second to next business day. For example, an order placed at 11 AM today will begin printing tomorrow, whereas an order placed at 9 PM tonight will begin printing the day after tomorrow.


Unfortunately, due to several restrictions, we are unable to ship to the following countries:

  1. Afghanistan
  2. American Samoa
  3. Belarus
  4. Brunei Darussalam
  5. Central African Republic
  6. The Democratic Republic of Congo
  7. Eritrea
  8. Guinea-bissau
  9. Iran
  10. Lebanon
  11. Libiya Arab Jamahriya
  12. Somalia
  13. Sudan
  14. Russian Federation
  15. Syrian Arab Republic
  16. Ukraine
  17. Venezuela