The book tells the story of Sanctuary – the world of Diablo – from the perspective of none other than series stalwart, Deckard Cain. The book is "designed to look like an in-world artifact from the Diablo universe" and chronicles "the eternal war that rages between the High Heavens and the Burning Hells." Furthermore, the book will contain artwork by "some of the world's most renowned fantasy artists," including Alan Lee, Adrian Smith and the man known as "Brom."
Diablo III: Book of Cain will be released in North America on December 13, with an international release planned for February 7. Think of it as pre-Diablo 3 warm-up for your mouse-clicking finger – assuming that's also your page-turning finger, of course.