I purchased the book as text for Mammology class @ BemidjI State University. The Author taught the course and related that he could find no book that gave the imformation as he wanted it presented. So he wrote the book as he saw it should be presented. The diagrams and dentition were fascinatiing. The range maps were entlightening. The book was organized by all the different orders of the mammal family. I am glad to return it to my collection of reference books.