The book "A New Mexican Long-eared Mouse (Myotis evotis) from Northeastern Mexico" is a study of a new species of long-eared mouse in the region of Northeastern Mexico. Authors Rollin G. Baker and Howard J. Staines present the results of their work, in which they describe a new type of formation and conduct a comparative analysis with other species of the genus Myotis. The book includes a detailed scientific description of the new species, its morphological features, biological characteristics and ecological duration. The authors also offer classification schemes and systematic conclusions that help to understand the place of the new species in the system of natural classification. This book will be a useful source of information for zoologists, ecologists, biologists, and anyone interested in studying Mexico's wildlife and biodiversity. Her results may also be important for the study of evolutionary processes in the genus Myotis and contribute to the preservation of these unique animals in the natural environment.