The book is a pretty slim volume, about 260 pages, but it’s an easy read too with plenty of screenshots.
Building social context using Facebook, google friend connect, and the Twitter API
A bit of rest, a bit of CodeIgniter and a lot of JSON and APIs
Build Successful Applications for the Facebook Platform
Put your website on Facebook, or put a bit of Facebook on your site. This book shows you how.
A Field Guide to Working With the MySpace Platform
An In-Depth Look at Google’s OpenSocial Specification.