The cover is gorgeous. Many of the illustrations inside are gorgeous as well. There's a bit of everything, each of his stages of painting, sculptures, and photography. However, it's a limited bit of each, and frankly I would have been happier with far fewer photos ( which were not Twombly's strength to my mind) and fewer largely look alike sculptures, to make room for many more drawings and hand created pictures. I also would have liked a basic bio overview of the artist, but not this book assumes you already know the basics.
The commentary is on one hand insightful, but in the other hand way way way too ornately written. This is art critique done as an art form in and of itself, showing off how many big words the author knows and how he can twist them to form ever more complex sounding thoughts. I get fed up with that kind of writing quickly. I would rather have a variety of writers, or types of information. How about some reprinted reviews and interviews with Twobly at the various stages of his career? Why not photos and specifics of the places he lived which clearly hugely influenced his moods and art?
Etc. etc.
Overall I am disappointed in this book which is mistitled. It is not comprehensive in covering the subject, nor does it give a 180 view of the subject. It is not "essential", it is a few thin slices of a much larger pie.
That said, heck of a nice cover.