The book Geographic Variation in Red-backed Mice (Genus Clethrionomys) of the Southern Rocky Mountain Region examines the diversity of the red-backed mouse species in the southern Rocky Mountains. The authors, Cockrum I. Landell and Fitch Kenneth Leonard, have devoted this book to a detailed analysis and description of the characteristics of members of the genus Clethrionomys in this particular geographic region. The study includes observing changes in the appearance, behavior and ecology of these mice depending on their specific location. The book is an important addition to scientific literature on biology and zoology, contributing to a better understanding of the general patterns of adaptation of species to various environmental conditions.