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 Cormac McCarthy...