This book by naturalist Craig Childs belongs on any Edward Abbey bookshelf, where writers have fallen in love with the desert Southwest and portray it eloquently on the printed page. Childs is more scientist than environmentalist, but he has Abbey's fascination with wilderness adventure, which takes him in search of what he regards as the most elemental aspect of the desert - the water to be found there. These searches take him far into remote areas of the vast Colorado River watershed, mostly in Arizona, including the canyons that feed into the Grand Canyon.
The book is divided into three sections: still water, streams, and flood. We discover that if one knows how to search for it - and the first inhabitants of these areas did know - there is water to be found in plentiful supply. Likewise, there are spring-fed streams that flow during certain seasons, and in and along both kinds of water there is a host of different life forms, plants and animals, each place representing a specific and evolving ecosystem. Childs' eye and ear for detail and his scientific knowledge join to create vivid accounts of the discoveries he makes as he explores. We learn, for instance, how pools of rainwater in the desert wastes become populated with forms of aquatic life and how these survive, even through long periods of extreme drought.
For me, a particularly harrowing adventure was his exploration of a system of caves from which a stream of ice-cold water emerges high on a canyon wall near the Grand Canyon. Others include his pursuit of floods in the making in this same system of canyons following summer cloudbursts, and he underscores the perilousness of his curiosity by describing the deaths of other hikers and campers taken by surprise by flash floods. Often he travels alone for days and weeks at a time; sometimes he takes along a companion. What he writes of his experiences is consistently full of wonder, as well as a realization that human interference with the natural order (pumping from aquifers, as just one example) is rapidly and permanently altering ecosystems that have adapted to the desert environment over millennia.