Pretty amazing book. I'd put it in the uniquely useful section of my library.
I bought this book at an art fair in New York. I was writing a paper on the "Happenings: New York, 1958–1963," on view at the Pace gallery at the time. Although this book is slightly after that time period I was studying, it really helped focus my attention to the details. To the handwriting, to the thought process, to the actions and inactions of the artist.The changes and notes, the margins, and errors. It's not a book as much as it is a running list of thoughts. A great way for me, as a reader, to see inside the artist thought process. I'd recommend it to any fan.