...iPhone in Action is another smash hit by Manning Publications. Whether you are a novice programmer or an advanced programmer new to the iPhone platform, you are going to finish this book feeling ready to take on the world.
Panah Rad, iPhoneAppsFinder.com
If I were teaching a class on the basics of developing for Apple’s new mobile platform, I would definitely use this as the textbook... iPhone in Action is a complete primer to iPhone development.
Victor Agreda, Jr., The Unofficial Apple Weblog (TUAW)
... well-suited for existing programmers who want comprehensive coverage of the iPhone platform, the development of webapps, and the key concepts in developing native apps with the SDK along with examples.