this book is about hybrid app development using PhoneGap / Cordova. Instead of giving text-only explanation, the book gives explanation through code by giving 12 exciting PhoneGap projects. The book is good for those who like to learn by ‘show me the code’. If you are experienced mobile developer and want to learn some part of the book by example, you are good with the book then,
I think the most attracting part of the book is Project 12 : Building a Backend - Working with Parse. Backend as a Service (BAAS) such as Parse is quite popular nowadays. BAAS allows developer to not worrying about server setup such as web server, database, etc. Mobile app often uses BAAS as their back end due to simplicity of BAAS. The book do a great job on explaining how does hybrid app interact with backend through CRUD example.