ClubJade.net points us to the Random House website where the've revealed the cover art for Star Wars: The Complete Vader. Written by Ryder Windham and Pete Vilmur, the non-fiction hardcover detailing the creation, development, and history of the Dark Lord of the Sith is set for an October 27, 2009 release.
UPDATE: Cover and short discription now online at Starwars.com as well.
UPDATE #2: The publisher of Star Wars: The Complete Vader, Becker & Mayer, have released a low-res sample page image that you can check out below...