Five of the best books about rivers, mighty and small

Robert Twigger is an explorer and the author of numerous books, including The Extinction Club, Real Men Eat Puffer Fish, and Angry White Pyjamas, for which he won the Somerset Maugham and William Hill Sports Book of the Year awards. His new book is Red Nile: The Biography of the World's Greatest River. In addition to writing books, he has contributed to Esquire, Lonely Planet Magazine, and Maxim.