Barnes & Noble is merging books and booze to save its book business.

The bookseller is opening four concept stores around the U.S. that will feature full restaurants that sell beer and wine.

>> Read more trending stories  

Barnes & Noble already has Starbucks cafes in most of its bookstores, but the new restaurants will feature breakfast, lunch and dinner menus, and a server will take your order.

The first store will open in Eastchester, New York, in October. The three other stores will be in Edina, Minnesota; Folsom, California; and Loudoun County, Virginia, Fortune reported.

The head of the project said it was about creating "a better bookstore" that drives traffic to the store and keeps people there longer.

The company has faced slumping sales recently thanks to people turning to online retailers, like Amazon, to buy books. Its sales fell .8 percent last quarter.

The company's Nook devices and e-book business aren't performing well either. Nook's market share is at 9 percent after it held 27 percent in 2011.

This video includes clips from StarbucksAmazon and Barnes & Noble, and images from Getty Images.