Book excerpt: This issue of Veterinary Clinics: Exotic Animal Practice, guest edited by Dr. Paul Raiti, is focused on Geriatrics. This is one of three issues each year selected by the series consulting editor, Dr. Jörg Mayer. Article topics include: Geriatric Freshwater and Marine fish; Geriatric Reptiles and Amphibians; Geriatric Psittacines; Geriatric raptors; Geriatric Rats, Mice, Hamsters, and Gerbils; Geriatric Ferrets; Geriatric Rabbits, Guinea Pigs, Chinchillas; Geriatric Invertebrates; Geriatric Hedgehogs; End of Life Decisions: Palliative Care, Hospice, and Euthanasia for Exotic Animals; and Pathology of Diseases of Geriatric Exotic Mammals.