Been reading a fair bit of Craig Childs lately, mostly on foot exploration in the southwest, Anasazi history, miss adventures, and so forth. To all the awesome river running books listed I'll ad The Liquid Locomotive, and some Neally if you can get your hands on it! Whitewater Tales of Terror was awesome!
Oh, big water little boats, and of course, Exploration of the Colorado River and it's Canyons.
"one Iliterate son of a bitch"