The company wil ship new devices in October and be available in US and UK stores in November
Barnes & Noble has unveiled NOOK HD and NOOK HD+ tablets as alternatives to Amazon's Kindle Fire and Apple's iPad.
The Nook HD features a display that offers a resolution at 1440 by 900, with 243 pixels per inch and HD video playback up to 720p.
Nook HD is powered by a dual-core 1.3GHz processor and 1GB RAM to enable the device to operate faster than Kindle Fire HD for an overall experience and 80% faster when it comes to graphics processing, the company said.
The Nook HD+ provides a full HD 9-inch display with resolution of 1920 by 1280 and 256ppi for about 1080p movies, magazines.
The fully laminated display reduces glare and offers angles for personal or shared viewing.
Weighing 515g, Nook HD+ is powered by a 1.5GHz dual-core processor with 1GB of RAM.
Both the devices will provide access to a collection of movies and TV shows through the new Nook Video.
The company will ship Nook HD and Nook HD+ in October and be available in US and UK stores in November this year ranging from $199 to $299.
Currently, Barnes & Noble has about 25% of the e-book market and for the quarter ended 28 July 2012, the company reported a loss of $41m while sales of Nook devices were flat at $192m.
Tablet sales are forecast to reach 118.9 million units in 2012, a 98% increase on 2011's 60 million units, according to a report by Gartner.