NGINX is a powerful software suite which has progressed well beyond a basic web server package. Some of the additional features, such as the reverse proxy and load balancing options, are well known.
Originally designed to tackle the C10k problem of handling 10,000 concurrent connections, NGINX differentiated itself from Apache with an event-driven architecture. While Apache 2.4 added event-driven processing also, there are a number of distinct differences where NGINX still remains more flexible.
This book describes how to use NGINX in a number of different scenarios and is aimed at providing you with a working solution rather than being an in-depth review of all NGINX features. If you're unfamiliar with NGINX, I highly recommend that you read Nginx HTTP Server - Third Edition, by Clément Nedelcu, also published by Packt Publishing.
http://nginx.org/en/docs/