The Usborne Book of Explorers is about people who made daring journeys to unknown places. It begins with the remarkable adventures of travellers in ancient times, then looks at the fascinating exploits of medieval explorers like Marco Polo. The book goes on to describe the brave voyages of discovery of the 15th and 16th centuries and how they changed the way people viewed the world. As well as discussing in detail the lives and careers of the most famous explorers, it look at the activities of lesser-known figures. Dramatic accounts of intrepid polar explorers, mountaineers, and astronauts bring the book up to date.