'As is made abundantly clear in this volume, and I know well from my own experience, nocturnal primates are never easy to study in the wild; in addition, pottos and lorises are rarely kept in captivity. Nevertheless, the editors have managed to gather together an impressive array of work from over 70 authors, covering a large number of topics ranging from the fossil record of these species to their conservation, through morphology, ecology, trade and many other subjects. In spite of all the information in this book, it also illustrates how much more research is needed on individual species in different field sites to ensure the conservation of these small, elusive, but fascinating, nocturnal creatures.' Caroline S. Harcourt, Nocturnal Primate Research Group (Oxford Brookes University) and Folia Primatologica