Book excerpt: In April 2008, Ed Stafford began his attempt to become the first man ever to walk the entire length of the River Amazon. Nearly two and a half years later, he had crossed the whole of South America to reach the mouth of the colossal river. With danger a constant companion - outwitting alligators, jaguars, pit vipers and electric eels, not to mention overcoming the hurdles of injuries and relentless tropical storms - Ed's journey demanded extreme physical and mental strength. Often warned by natives that he would die, Ed even found himself pursued by machete-wielding tribesmen and detained for murder. However, Ed's journey was an adventure with a purpose: to help raise people's awareness of environmental issues. Ed had unprecedented access to indigenous communities and witnessed the devastating effects of the deforestation of the Amazon rainforest first-hand. His story of disappearing tribes and loss of habitats concerns us all. Ultimately though, Walking the Amazon is an account of a world-first expedition that takes readers on the most daring journey along the world's greatest river and through the most bio-diverse habitat on earth.