This hardcover edition is in near-fine condition, with tight, unread pages. The book remains firm and square, showing some shelf wear along the edges. Invertebrates, Second Edition by Richard C. Brusca and Gary J. Brusca, published by Sinauer Associates Inc., is a widely respected textbook covering the biology, classification, and evolution of invertebrates. Known for its comprehensive approach to invertebrate diversity, morphology, physiology, and ecology, this edition includes updated classifications and evolutionary insights, incorporating molecular phylogenetics. It is widely used as a university-level textbook for courses in invertebrate zoology and evolutionary biology.