It's Their Bookstore

And they can do whatever they want. Here, in a nutshell, is the secret to bookselling success. Don't be the same as everyone else. Be different. Books are different. Read what you like. And sell what you like, too.

http://www.nytimes.com/2010/01/10/nyregion/10stop.html?ref=todayspaper

(Read the 4th para.)