The book "A Distributional Study of the Amphibians of the Isthmus of Tehuantepec, Mexico" by William Edward Duellman is an essential reference for the study of amphibian diversity in the Isthmus of Tehuantepec region of Mexico. In this scientific publication, the author describes in detail the species of amphibians, their habitats, habits and ecology. Duellman includes the results of his research conducted in the field, as well as an analysis of distribution patterns, which allows establishing the peculiarities of the distribution of different species of amphibians in this unique region. The book contains illustrations, diagrams and maps to help readers better understand the geography and placement of species in the biodiversity of the Isthmus of Tehuantepec. This book will be a useful resource for students, researchers, and anyone interested in the study and conservation of wildlife, particularly amphibians, in this region of Mexico.