SmartGo Books
http://www.smartgo.com/books.htm
A reader for Go books available for Apple iOS devices such as iPhone, iPad and iTouch (iPod Touch) created by Anders Kierulf. The diagrams in SmartGo Books are interactive. Users can navigate backward and forward through the moves or view them all at once with, or without, numbered stones.
The list of books currently available can be found here:
http://www.smartgo.com/booklist.htm
SmartGo Books currently offers twenty-seven Go books by six publishers (Kiseido, Slate & Shell, Hinoki Press, Good Move Press, Yutopian, and Learn Go Press), plus books by Michael Redmond and van Zeijst/Bozulich written specifically for SmartGo Books. And we're proud to offer Killer of Go, a book that has been out of print for years. More books are in the works.
Currently SmartGo Books is available for iOS. A version for Apple OSX is in the works. Android and PC versions aren't available yet.