-- Records of the Teachers and Students of the Lanka presents a complete set of biographies of the Zen patriarchs.
-- Bodhidharma's Treatise on Contemplating Mind -- written in the form of a dialogue between the first Zen patriarch, Bodhidharma, and his successor, Huike -- views all the various practices of the Bodhisattva path from the perspective of cultivating mind.
-- Treatise on Sudden Enlightenment presents a series of questions and answers illuminating the true nature of "sudden enlightenment" as pure, undifferentiated mind.
Dating from the first half of the eighth century, and only recently rediscovered in Tun Huang, China, these books offer the best information currently available on the early meditation techniques of the "northern school" of Zen Buddhism.