Tropical ClassicalBy: Pico Iyer In Tropical Classical the author of Video Nights in Katmandu and The Lady and the Monk visits a holy city in Ethiopia, where hooded worshippers practice a Christianity that has remained unchanged since the Middle Ages. He follows the bewilderingly complex route of Bombay's dabbawallahs, who each day ferry 100,000 different lunches to 100,000 different workers. Iyer chats with the Dalai Lama and assesses the books of Salman Rushdie and