Here are a couple of bookish facts from Bibliotopia for your amusement.
The oldest bookstore in the United States is The Moravian Books Shop in Bethlehem, PA. It was established in 1775 and is believed to be the longest operating bookstore in America.
Barnes and Noble is the largest bookstore chain and Amazon.com is the largest online only bookstore. The largest single bookstore is Powell's Books in Portland, OR--43,000 square feet of pure bliss. (I've never been there, but I am imagining how wonderful it must be!)
The first bookstore to sell only paperbacks was City Lights Book Shop. The poet Lawrence Ferlinghetti opened the store in San Francisco in 1953.