Which book do you suggest to learn about iPhone development:
Three books caught my eye:
Manning "iPhone In Action"
PragProg "iPhone SDK Development"
Oreilly "Head First iPhone Development"
Which book do you suggest (even it is not listed in my list)?
I don't know Objective-C and Cocoa framework.
John Todd wrote:Do you suggest to read both books of Apress and PragProg? or one of them is enough?
If I decided to pick Apress book, what I'm missing in PragProg' book?
Is iPhone development is easy to grasp in general? or takes a considerable amount of time?
Read everything you can. Each book feels different to each person. With regards to iphone dev being easy or not, for me, it was more about learning Objective-C and the iPhone way of doing things. Read through Apple's Human Interface Guidelines. You can get screwed in the App Store if you don't (chances are you will at least once anyway).
When I submitted, I believe it was three rejections I got for not following the guidlines or memory leak or bug. Since then, I have not been rejected once, and I have 4 iPhone apps on the store.
I also agree with Gregg, read as much as you can. I wouldn't say just buy one.
I also think spending time on Objective-C, memory management, and how Apple's MVC works.