New York: Harry N. Abrams, Inc., Publishers, . Black and white photographs. Softcover. Square quarto. 341,  pages. Very good with light extremity rubs, slight fading, and a faint vertical spine crease.
Kaprow's important book on the then emerging field of performance art. It has the special merit of documenting this movement from within, at the beginning, in real time. He had originally written this work in 1959-1960, revised it in 1961, and revised it yet again for its first publication, here. Alluding to the rapidly shifting art scene, he notes in the Preface that "If I wrote it again it would be a different book."