Just got a copy of Security Strategies in Web Applications and Social Networking.  Not the newest book around, but it still is quite relevant. 

The book details how to securely design and deploy web applications. 

In just under 400 pages, it covers a lot of the core aspects of web app security, including a significant emphasis on mobile devices. 

The book is extremely detailed, very organized and provides a good balance of information, including technical details and implementation guidelines. 

Looks to be a really good book. 

Full review to follow.