Through a series of twenty individual vignettes, Hendrix (geology, U. of Montana) provides readers with an overview of many of the fascinating geological feature of the Yellowstone National Park area. Each chapter features color maps and illustrations and provides a mini-lecture on the unique geological forces and features of the site as well as direction for reaching each location. Besides the world famous geyser Old-Faithful, the work covers both well traveled and more remote sites including fossilized forests, hot springs, glacial deposits and calderas. Annotation 2011 Book News, Inc., Portland, OR (booknews.com)