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iOS 5 Programming Cookbook : Solutions and Examples for iPhone, iPad, and iPod Touch Apps by Vandad NahavandipoorBetter World Books$3.98
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My iPad 2 (covers IOS 5) by Gary RosenzweigBetter World Books$8.29
iPhone 4s - Made Simple : For iPhone 4s and Other iOS 5-Enabled Iphones by Martin, Mazo, Gary, Ritchie, Rene TrautscholdBetter World Books