Waters, a river scientist, fly fisher, paddler and fisheries professor, emeritus, at the U. of Minnesota, offers a readable examination of the complex life of rivers, intended for hikers, artists, photographers, and river advocates. Discussion of particular river systems around the US and the many species that inhabit these ecosystems reveals larger issues of ecological order, biodiversity, river dynamics, life on the river bottom, fish, and other subjects. A glossary defines technical terms. B&w illustrations. Annotation c. Book News, Inc., Portland, OR (booknews.com)