This textbook is a great resource for students and researchers interested in the subject area of invertebrates. The book titled “Animals Without Backbones: An Introduction to the Invertebrates” is a part of the New Plan Texts at the University of Chicago Ser. series. It was published in 1987 by University of Chicago Press and authored by Vicki Pearse, John Pearse, Mildred Buchsbaum, and Ralph Buchsbaum. The trade paperback format of the book is 582 pages long and measures 0.9 inches in length, 0.8 inches in width, and 0.1 inches in height. It is a reprint edition and weighs 38.2 ounces. The book is written in English and covers various aspects of life sciences, zoology, and general topics related to invertebrates.