A generously illustrated guide to China with the usual National Geographic attention to maps and photographs, covering the big cities and the Yangtze, as well as southern, western and northeastern China in unusual depth. Harper writes with authority in a lively, opinionated style; no surprise, since he is also the co-author of three guides on the region for Lonely Planet. With a 50-page appendix of practical travel information.  (CHN163, $27.95)