Reference documentation and further reading
Reading a book is great (and reading this book is even better), but continuous learning is the only way to keep up to date with MongoDB.
The online documentation available at https://docs.mongodb.com/manual/ is the perfect starting point for every developer, new or seasoned.
The JIRA tracker is a great place to take a look at fixed bugs and the features that are coming up next: https://jira.mongodb.org/browse/SERVER/.
Some other great books on MongoDB are listed as follows:
- MongoDB Fundamentals: A hands-on guide to using MongoDB and Atlas in the real world, by Amit Phaltankar and Juned Ahsan
- MongoDB: The Definitive Guide 3e: Powerful and Scalable Data Storage, by Shannon Bradshaw and Eoin Brazil
- MongoDB Topology Design: Scalability, Security, and Compliance on a Global Scale, by Nicholas Cottrell
- Any book by Kristina Chodorow
The MongoDB user group (https://groups.google.com/forum/#!forum/mongodb-user) has a great archive of user questions about features and long-standing bugs. It is a place to go when something doesn’t work as expected.
Online forums (such as Stack Overflow and Reddit, among others) are always a source of knowledge, with the caveat that something might have been posted a few years ago and might not apply anymore. Always check before trying.
Finally, MongoDB University is a great place to keep your skills up to date and to learn about the latest features and additions: https://university.mongodb.com/.