Dropping into the unknown on a rubber raft, hurled against rocks and cliff walls, only to round a blind bend, go vertical on a 10-foot standing wave, and flip over backwards into a deafening vat of near-freezing whitewater. Such is life for the brave souls who commit themselves to exploring the world's untried rivers. First Descents collects the most enthralling tales from the world's most respected river explorers. Vivid portrayals in the adventurers'...