The rodents are the world's most numerous and diverse group of mammals and British Columbia is home to 45 species. Nagorsen summarizes the most up-to-date information on these mammals. He discusses their general biology, including ecology, diet, anatomy, conservation and relations with humans. Illustrated keys aid in identification of the 52 species inhabitting the province. For each species, the author describes its natural history, identifying characteristics, taxonomy and conservation status in the province. Each species account is accompanied by illustrations and a distribution map.