start the gaming programming in ios
i am an ios app developer. now I want to move ahead on gaming side.I found lots books on iOS gaming on Google. I just need to help about which is the best book and tutorials to start at basic level side. I already read about cocos2d book.  

thank you very much 
start the gaming programming in ios
===

i am an ios app developer. now I want to move ahead on gaming side.I found lots books on iOS gaming on Google. I just need to help about which is the best book and tutorials to start at basic level side. I already read about cocos2d book.  

thank you very much 