These book-specific shopping search engines let you search for a book by title, author or ISBN, to find out where it is available and for how much. These sites include everything from rare first editions to old paperbacks.
Inkmesh.com can help you find the best deals on eBooks. The site aggregates the eBooks by store, price, format and device. eBookNewser has more about how it works: “For example, if you search for Stieg Larsson‘s The Girl With the Dragon Tattoo, you can see that the eBook is available tells you how much it costs $5.00 from Amazon, Barnes & Noble and Sony. It’s $6.99 from BooksOnBoard, $7.99 from the iBookstore and $9.99 from the Diesel eBookstore, eBooks.com and Kobo.”