This book (chapbook, actually) is a collection of essays by Marion Zimmer Bradley, Norman Spinrad, and Alfred Bester.
Bradley's essay is titled Experiment Perilous and talks about the New Wave in science fiction comparing it to earlier new experiments in SF, in particular whether sex belongs in SF and whether realism belongs in sf (not only does the hero have to save the world but he has sand in his spacesuit and a toothache).
Spinrad's essay titled The Bug Jack Barron Papers talks about his experience writing the book and his feelings about the New Wave in contrast to Bradley's view.
Bester's essay titled Writing and 'The Demolished Man' talks about how he writes and his view of SF in the world of writing.
This is an interesting collection of opinions and different ways of handling being (or having been) on the 'cutting edge'.