This extensive collection of essays on the heart of zazen practice is essential reading for any practitioner of Zen, and of great value to all who are interested in Eastern religions. Shikantaza, ''just sitting,'' is the simplest, yet most subtle and profound form of meditation. This unparalleled volume brings together writings from ancient and modern sources, filtered through the discerning eye of an authentic Zen teacher. Included are the seminal writings of the Chinese Master Hongzhi, chapters from Master Dogen, commentaries from Yasutani Roshi and Maezumi Roshi, as well as discourses by the teachers of the Mountains and Rivers Order. 224 pp., pb.