Apple在iBook Store上公開六本iOS軟體開發書籍。

Apple將原提供給iOS開發者的PDF文件放到了iBook Store 讓所有人公開下載。這六本書分別為：

• Cocoa Fundamental's Guide


• The Objective-C Programming Language


• iOS Application Programming Guide


• Object Oriented Programming With Objective-C


• iOS Technology Overview


• iOS Human Interface Guidelines.