Book excerpt: This handy book is designed to allow users to quickly identify the trees they encounter in the Sierra Nevada. Unlike other tree identification manuals, it limits its scope. A total of 38 of the most common species are included, along with information on distinguishing similar tree varieties, a discussion of plant relationships, a listing of prominent field marks, and references. A simple key is tied to thorough descriptions of the various Sierra trees. Multiple drawings illustrate the text. Covering the length of the Sierra Nevada, the Tree Identifier should prove useful to visitors throughout the mountain range.