Excellent book and buy
This is a terrific resource book, particularly on the history and philosophy behind Zen Koan practice, as reflected in both the Rinzai and Soto traditions. It is not, however, a "how to" book. The editor, the profoundly insighful Daido Loori Roshi, properly leaves the "how" to actual koan practice between student and teacher. His choice of authors and resources is flawless. It's a powerful book and I highly recommend it.
