Found in 1 comment on Hacker News
codercowboy · 2012-05-07 · Original thread
I was more or less the same as you, Java instead of C#. Built some of the apps on in a few weeks with help from this book, very highly recommended:

The iOS 5 Developer's Cookbook by Erica Sadun

A few (three or four) zero-to-go chapters in about 50 pages, then entire chapters dedicated on various chunks of the IOS objective-c library. Perfect.

Fresh book recommendations delivered straight to your inbox every Thursday.