Amazon Lists The History of Sonic the Hedgehog
In honor of Sonics 20th anniversary, Udon Entertainment and Sega have teamed up to make a retrospective book. This 300 page hardcover book will cover every Sonic game, crossover and spinoff, so there is sure to be something for everyone. Additionally there will be character profiles, promotional / concept art, plus a detailed origin of the blue hedgehog.
Currently it’s set to release on October 9th 2012 and will retail for $50. However you can currently preorder it from Amazon for $32.14.