The two tablets will be available to pre-order next month and be released mid-November. B&N is hoping to outdo the Google Nexus 7 Android tablet, Kindle Fire HD and even the latest iPad with the Nook HD and Nook HD+. The firm also announced two Simple Touch eReaders to rival Amazon's Kindle.
Both the Nook HD and Nook HD+ are Android 4.0 Ice Cream Sandwich tablets but, like the Kindle Fire range, have a heavily modified user interface. The US firm is touting better screens and lighter designs than its rivals at competitive price points.
William Lynch, CEO of Barnes & Noble said: "With the combination of the highest resolution screen, lightest weight and expansive access to content rendered in a digital quality never before seen, Nook HD is the world’s best 7-inch media tablet."
The Nook HD is a 7in tablet which uses a 1440 x 900 resolution, higher than the 1280 x 800 found on the Nexus 7 and Kindle Fire HD. The tablet is also lighter than its rivals at 315g. It runs on an OMAP 4470 1.3GHz dual-core processor and 1GB of RAM.
B&N said the Nook HD will come in two colours, 'smoke' (aka grey) and 'snow' (aka white). The tablet will cost £159 and £189 for 8GB and 16GB models, respectively. Group test: What's the best tablet PC?
The Nook HD+ is an iPad rival which B&N is calling "the lightest and lowest-priced full HD tablet ever". It weighs 515g and is priced at £229 and £269 for 16GB and 32GB models, respectively.
See also: is the Nexus 7 a good deal?
It uses a 9in display with a 1920 x 1280 resolution (higher than Full HD) with the same processor as the Nook HD, but clocked higher at 1.5GHz.
"We designed our larger format tablet Nook HD+, because we think there’s big demand from customers for a super-light, extremely high 4 quality 9-inch tablet, at half the price of the iPad." added Lynch.
Neither tablet has any cameras but unlike the mentioned rivals, they both have a microSD card slot for storage expansion. B&N claims each tablet will provide nine hours of battery life when watching video with Wi-Fi switched off.