Regular source Eddie recently pointed out a new title and description of the Vader guide coming in October, which he found at beckermayer.com:

"Fully licensed with Lucasfilm, VADER will be the definitive book on the history, myth, and cultural impact of Darth Vader. From his early development by George Lucas in the original classic films, to the new legends created in comics and novels, to his appearances on everything from commercials to bedspreads, VADER will present a complete view of the character. This book will contain unique pieces both printed flat and removable, including never-before-seen concept sketches, rare promotional materials, early comic books, video games, action figures, merchandise, movie posters, and more."

The book, now titled Vader: The Dark Lord and His Universe, is by Ryder Windham and Pete Vilmur and is due out in October.