With the demise of Borders and the struggling story of Barnes & Noble, the future looks like it's going to consist of only two sources of books: online retailers and indie bookstores. If you enjoy the feel and ambiance of being in a room with a selection of books to browse through, please support your locally run independent bookstore.
I added a link on the Spheria page to find your nearest indie bookstore. If you don't find Spheria there, you can easily special order it. Happy reading!