This is the companion artbook to the GENGA exhibition that was held in April & May 2012. The exhibition featured over 3000 pages of manga from Otomo Katsuhiro's 39 years of career since 1973.
This is a large 256-page paperback measuring 10 by 14 inches. That's larger that all the other Otomo Katsuhiro artbooks I've seen.
While there are some new and unpublished artwork, some have also appeared in other books such as KABA, KABA2, Akira Club, The Memory of Memories, ビバ・イル・チクリッシモ! (VIVA IL CICLISSIMO!) and possibly others. Those artbooks are quite expensive to ship from Japan.
The manga art are printed satisfyingly huge. The scans and reproduction are great. You can see how words are pasted onto the speech bubbles, the details of the ink work and hatching lines and painted illustrations. The format is large enough to show off all the meticulous work put into drawing those panels.
There are a few interviews in Japanese but the book also comes with a small booklet with the English translations.
If you have other artbooks, I think this is still a great addition.
(There are more pictures of the book on my blog. Just visit my Amazon profile for the link.)