One of the coolest pieces of Diablo III Merchandise to yet be revealed, the Book of Cain first appeared on June 30, 2011, with a listing on Amazon.com. That entry included the book description and the cover artwork, and gave a release date of 11/11/2011. The listing was removed a few days later, without any kind of official comment by Blizzard, and it’s been gone ever since. (Though listings on Amazon UK, Canada, and Germany remained online.)
Thanks to HolyKnight for noticing that the book has returned to Amazon.com with a new listing, new cover art, eight sample pages, and a release date of November 25, 2011. Sadly, the sample pages are only 400px in width and are thus too small to read, (challenge accepted?) but you can get an idea of the artwork and overall quality and content of the 148 page tome. As suspected, it does look like a much-expanded version of Deckard Cain’s Journal, but that’s not a bad thing.
You see a couple of sample pages below; click to the Book of Cain wiki article for all of the book images, plus more product info.