This is a very useful information resource for primatologists. Its production represents a notable international effort. The directory is divided into five main sections and has four indexes. The main sections provide data on organizations, field studies, populationmanagement groups, primate societies, and information resources. There are indexes for organizations, species, subjects, and names of individuals. Three hundred and seven organizations are listed and, for each, data are provided on contact addresses and telecommunication numbers, the mission, research programmes, species supported, key personnel, training opportunities provided, and other aspects. The section on populationmanagement groups lists all the studbook and species programmes and includes a recent ISIS abstract containing data (numbers, sexes, locations) on all the primates kept in ISIS registered zoos and primate centres throughout the world. If you want to know, for example, where and how many Callithrix geoffroyi are maintained in captivity, this is a good place to start. The primate societies section contains the names and addresses of all the members of the International Primate Society and data on 27 other primate societies, including contact names and addresses, and details of their missions and activities. The final main section provides data on various primate information resources: information centres, resources for animal exchange and animal care supplies, details of internet-based information sources (Primatetalk, AskPrimate, and others), primatology web sites, journals and newsletters. The indexes make the directory very easy to use. Although there is much here of relevance to the subject, welfare is, regrettably, not listed as a subject heading in the index. This will be a valuable tool for many primatologists and would-be primatologists, and the price is very reasonable.