When we write apps which involves Web Service Call, there comes json. There is great amount of work which needs to be concentrated in parsing the JSON to POJO when we don't use any JSON Parsing libraries. Thanks to Google for contributing to GSON - is simple awesome library JSON to Java Objects conversion library.
The Instant GSON by Sandeep Kumar Patel is more than a documentation which provides you sufficient knowledge about handling JSON in Java. All the major scenarios like converting to-JSON, from-JSON, NULL, Data Types, places where excess care is required, nested classes, user defined naming field support is all been explained to core.
I would recommend this book for people who are having difficult handling JSON and following ad-hoc ways of parsing JSON, or people with basic GSON and would like to explore additional detailed API and options.