The Book of Tea / Kakuzo Okakura

Kakuzo's The Book of Tea is a charming little explanation of the role of tea (or teaism) is Zen and Taoism. He has chapters on the boiling, whipping, and steeping of tea; Tao and Zen; tea rooms, art appreciation, flower arrangement, and tea masters. For a fuller treatment of much of this material see D.T. Suzuki's Zen and Japanese Culture.