iPhone Games

I have an application i would like to write for an iphone. I have limited experience with programming. I have gotten some books but they seem to be written for people who are already familiar with the programming language.
What is a good book for learning cocoa and/or other programming essentials for the iphone?

ive looked at the Griffin PowerBlock, and another one thats like $80! but was supposedly really good. But i just got the iphone 3GS and i didnt “kill the battery” the first time i got it, (is that event true? like you have to kill the battery inorder to have a longer battery life?) …
anyways, which product/tips to you recommend, for my iphones battery life to last longer?