FILE – In this Tuesday, Feb. 26, 2013 file photo, nook tablets are on display at a Barnes and Noble bookstore in Los Angeles. Barnes & Noble is teaming up with Google to vastly increase the number of apps available on its Nook HD tablets. The bookstore chain says it will add Googles Play app store to its Nook HD and HD+ products via a software update on Friday, May 3, 2013. (AP Photo/Jae C. Hong, File)