Want to get the best price on digital books? Inkmesh.com can help. The site aggregates the eBooks by store, price, format and device.
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.
BooksOnBoard has the most different formats. The retailer has the eBooks in the following formats: Adobe Digital Editions PDF, Adobe Digital Editions ePub, eReader, Microsoft Reader and MobiPocket.
UPDATE: It turns out that this price engine is not so effective. If you click through on almost every single one of these, you will find the eBook price is currently $9.99 across retailers (The price only various from UK retailers). Oddly these aren’t even the prices for the print titles at these stores.