Vanilla is a product of Lussumo:
Documentation and Support.
Retailers who ordered the early volumes of the Girl Genius paperbacks weren't told that the Foglios would later be competing with them by selling digital downloads of the collections for a third of the price at www.DriveThruComics.com . Same with Checker who offers books through both that site and www.wowio.com - books that retailers bought not knowing they would be available online for much cheaper, or free. Should these books be returnable now too? Hey, Action Philosophers is on there too, at a third of cover - returnability!!!