Idaho-based Tyson and Clelland (both with the National Outdoor Leadership School) have extensive experience teaching and traveling on glaciers throughout the world. Combining Tyson's text with Clelland's humorous but informative illustrations, their guide provides readers with the knowledge and advanced techniques needed to safely cross glaciers and extract oneself from crevasses--all meant to first be practiced in a safe, controlled environment such as a lawn, a tree, or an unglaciated snowfield. The text is not a comprehensive mountaineering manual and assumes readers have already learned many basic outdoor skills from a credible instructor, such as fundamental rope work, avalanche safety, and first aid. No subject index. Annotation ©2009 Book News, Inc., Portland, OR (booknews.com)