Packt recently released a new Cocos2d book: “Cocos2d for iPhone 1 Game Development Cookbook” by Nathan Burba.

Overview of Cocos2d for iPhone 1 Game Development Cookbook
- Discover advanced Cocos2d, OpenGL ES, and iOS techniques spanning all areas of the game development process
- Learn how to create top-down isometric games, side-scrolling platformers, and games with realistic lighting
- Full of fun and engaging recipes with modular libraries that can be plugged into your project
- Over 90 recipes for iOS 2D game development using cocos2d
Link: http://www.packtpub.com/cocos2d-for-iphone-1-game-development-cookbook/book