From the publisher: "Vast and majestic, the Grand Canyon represents one of science's most challenging puzzles: How did this massive canyon come to be? This is the story of the search for the answers, and the first account of the consensus geologists have reached in the last few years. A scientific detective tale packed with colorful characters, Grand Canyon follows the explorers, adventurers, and geologists whose efforts led to the understanding of the canyon's mysteries. ... An eloquent, breathtaking narrative, Grand Canyon is a fascinating true story that is as epic as its subject." Powell is also the author of The Mysteries of Terra Firma: Exploring the Age and Evolution of the World.