Determined to document the vanishing riches of central Africa's last wild places, ecologist J. Michael Fay set off on a grueling 465-day trek through Congo's darkest jungles to Gabon's virgin shore. In The Long Follow, critically-acclaimed essayist David Quammen chronicles that harrowing feat (famously named the Megatransect) and makes it the heart of his engrossing, wide-ranging look both at the rich history of past great African expeditions...