The book "A New Bat (Pipistrellus) from Northeastern Mexico" by Rollin G. Baker is a detailed scientific study of a new population of Pipistrellus bats discovered in northeastern Mexico. This book highlights the results of the study and classification of a new Pipistrellus specimen, including its morphological characteristics, behavior and habitat features. The author reveals the unique aspects of the life of this species of bats, which will contribute to the expansion of knowledge about the fauna of the northeastern region of Mexico. The book contains illustrations, diagrams and tables that help the reader better understand the presented scientific information. "A New Pipistrellus (Genus Pipistrellus) from Northeastern Mexico" is a valuable addition to the nature and biodiversity studies literature.