What is a good book for learning iPhone language?

i want to be an iPhone app developer. I got iphone application development for dummies (all in one), except i haven't started it yet. i was wondering if you needed any prior knowledge in coding to program for the iphone. If i do, could you please point me to a source for ABSOLUTE beginners. like with no experience AT ALL. AT ALL. Kinda like a person whose lived in siberia for all of their life, and has never heard the english language spoken, and wants to learn the english language fully.