This is the third edition of Conway and Hillegass' iOS Programming book, based upon the curriculum used at Hillegass' Big Nerd Ranch training facility in Atlanta, Georgia. The third edition is updated and expanded to cover iOS 5 and Xcode 4.3. In addition to features included in previous editions, the third edition includes coverage of new features, including Automatic Reference Counting (ARC), iCloud integration, and using Storyboards for UI design.
A note on the title: The first edition of iOS Programming: The Big Nerd Ranch Guide was titled iPhone Programming: The Big Nerd Ranch Guide. The title was updated for the second edition, to reflect Apple's introduction of the iPad and their renaming of the iPhone operating system.