I'm a mobile developer who does tons of iPhone work. I buy pretty much every iPhone book out there: Basically, any book over 400 pages that is up to date with i

I'm a mobile developer who does tons of iPhone work. I buy pretty much every iPhone book out there: Basically, any book over 400 pages that is up to date with iOS 3 is good enough, as the iOS 4 changes aren't really that useful for the majority of people.