John Basanese

Barnes & Noble’s (BKS) two new Android Wi-Fi tablets, the 7-inch Nook HD and 9-inch Nook HD+, aim to compete with other moderately priced tablets such as Amazon’s (AMZN) Kindle Fire and Google’s (GOOG) Nexus 7. The Nook tablets, starting at $199 coming available in October, differentiate themselves most from competitors when it comes to some new reading and “discoverability” features.

“We’re Barnes & Noble, and books is one of our main categories,” Theresa Horner, B&N’s vice president of digital content, said at a briefing on Tuesday.