In this new book Edwin Cooper surveys the field of comparative immunology; a field that has undergone great growth over the last twenty years. After an introduction to the immune response and its phylogeny, phagocytosis and primordial cell-mediated immunity are discussed, followed by a number of chapters that cover transplantation immunity. Humoral immunity is then discussed with chapters on invertebrates, antibody synthesis, and immunoglobulins. The book finishes with accounts of immunomodulation and diseases of the immune system. This book will be an invaluable guide and reference to immunologists and zoologists who are interested in the comparative aspects of the immune system.