Author: John Lawton. Besides exotic merchandise, the Silk Road, Spice Route, and Incense Trail also carried new ideas and religions over vast distances. As pathways of conquering armies and armadas, they also helped shape the world. To highlight the importance of these routes in the development of humanity, UNESCO organized a series of land and sea expeditions along them, resulting in this book that retraces the Silk Road, Spice Route, and Incense Trail throughout history and around the world. Hardcover.