MONASTIC DISCIPLINE: Vinaya and Orthodox Monasticism, an Attempt at Comparison, by George Sioris. Chiang Mai: The Knowledge Center, 375 pp., 495 baht (paper). LEFT VERSUS RIGHT, by George Sioris. Chiang Mai: The Knowledge Center, 150 pp., 195 baht (paper). George Sioris, a Greek scholar on Asia and a commentator on Asian affairs, has added two new titles to his writings: The first, "Monastic Discipline," is a lengthy study aimed at establishing the similarities as well as the differences between two entirely different monastic systems -- the Theravada Buddhist and the Christian Orthodox.