Update: This book is out
Udon has just released the English edition of the Japanese artbook Dark Souls Design Works ダークソウルデザインワークズ. Hardcover, 128 pages.
I've previously reviewed the Japanese edition so you can check out that review which I'll not be duplicating here. It's a nice book, but I was expecting more content after seeing how much there was in the game.
Visit Amazon to check out more reviews.
If you buy from the links, I get a little commission that helps me get more books to feature.