University of Chicago Press 1972 (2nd impression, 1974) Trade paperback VERY GOOD Tight, bright, clean interior, light age soil to covers with solid binding but slightly tilted spine. Foxing to exterior page edges and rubbed cover edges. 2" crease on front cover. 335 indexed pages. 6.75x9.25x 1" (17x23.5x2.5cm) Hans Kruuk (co-founder of the Serengeti Research Institute in Tanzania) studied hyenas while living in the wilderness of Africa's Serengeti and Ngorongoro Crater for many years. This book details his research on hyenas, including field notes, photographs, information on hunting behavior, social interaction, interactions with other predators, and comparison of their techniques and behaviors with other social hunters.