Sam Kaiser

At the age of 24, Alastair Humphreys set off to try to cycle round the world. By the time he arrived back home, four years later, he had ridden 46,000 miles across five continents on a budget of just £7,000. From frozen Siberia tundra to the jungles of central Africa, Alastair recounts his extraordinary his adventures in two parts - Moods of Future Joys and Thunder & Sunshine - brought together in audiobook for the first time.

Fifty-year-old canoe racer-turned-explorer West Hansen is planning to kayak the Amazon River when he learns that everyone - cartographers, adventurers, even his own sponsor, National Geographic Society - has misplaced the source of the world's greatest river. One of exploration's great prizes is suddenly back up for grabs, and to claim it all, Hansen has to shepherd a team of irascible Texans and international whitewater stars some 4,200 miles, from the crest of the Peruvian Andes to the Atlantic Ocean.