A nicely illustrated account of an extraordinary, 16-year trek from Xi'an to India by way of Central Asia in search of the origins of Buddhism by Xuan-Zang, the famous 7th-century Chinese monk. Modern travelers will find the descriptions of Buddhist sites and shrines of much interest, including the original accounts of Dunhuang, Samarkand the now-obliterated Buddhas of Bamiyan in Afghanistan. With maps and photographs.  (ASA31, $25.00)