Learn Java for Android Development
Beginning Windows Phone 7 Development
The Business of iPhone and iPad App Development: Making and Marketing Apps That Succeed
Learn iPhone and iPad cocos2d Game Development
Pro Core Data for iOS: Data Access and Persistence Engine for iPhone,iPad, and iPod Touch
Windows Phone 7 Recipes : A Problem-Solution Approach
Android Recipes : A Problem-Solution Approach
Beginning Silverlight 5 in C#
Learn Excel 2011 for Mac
Beginning iOS Apps with Facebook and Twitter APIs : for iPhone,iPad, and iPod touch
Android Tablets Made Simple : For Motorola XOOM,Samsung Galaxy Tab, Asus, Toshiba and Other Tablets