This combination of file photos shows the 7-inch Amazon Kindle HDX tablet, left, and the Samsung Galaxy Tab 4 Nook.
2/7
A brand ambassador handles a new Samsung Galaxy Tab 4.
3/7
A brand ambassador holds a new Samsung Galaxy Tab 4 Nook during the unveiling of the co-branded tablet that will replace B&N's Nook.
4/7
Galaxy Tab 4 Nook is a co-branded tablet that will replace B&N's Nook.
5/7
Tim Baxter, president of Samsung Electronics America, left, and Mike Huseby, CEO of Barnes & Noble, pose for a photograph.
6/7
The 7-inch tablet will sell for $179 after a $20 instant rebate, the same entry price of the non-branded Samsung Galaxy Tab 4.
7/7
Mike Huseby, CEO of Barnes & Noble, speaks during the unveiling of a new Barnes & Noble and Samsung co-branded tablet called the Samsung Galaxy Tab 4 Nook.