Best book about iPhone programming (covers iPhone's sensors)

Rate: A+
Author: Alasdair Allan

In this book you will learn about iPhone's sensors, data input, storage, and the basic stuff: xcode premier and submitting your app to the App Store.

The book also covers memory management for the iphone... this chapter is really useful for beginners.

Book's website: http://www.learningiphoneprogramming.com/pages/thebook.html