There have been a lot of people slamming this book because it's not for beginners. But it's from Addison Wesley's Professional Developer's Library, so that should not be a surprise.



What *is* a surprise is just how well written this book is -- taut prose, well edited, with a ton of useful tricks and tips on every page.



I really hope it's updated to deal with iOS 4, this book deserves a long life.