Apple has recently put a number of Apple Developer Publications books into the iBookstore for free.
The titles are:
- The Objective-C Programming Language
- Object-Oriented Programming with Objective-C
- iOS Technology Overview
- iOS Application Programming Guide
- iOS Human Interface Guidelines
- Cocoa Fundamentals Guide
Perfect reading to have during a commute, while standing in line, while loafing at Starbucks, or even on an exercise bike or treadmill.
We've come a long way since Inside Macintosh!