This is the first volume devoted to the study of woolly monkey systematics, ecology, behavior, and conservation. Defler (National Univ. of Colombia) and Stevenson (Univ. of the Andes) have assembled a series of contributions by leading primatologists that provide an excellent overview of the current knowledge of the species. Overall, this volume is a critical resource for students and scholars with a serious interest in New World primates. Summing Up: Essential. Primatology collections serving upper-division undergraduates and above. (T. Harrison, Choice, Vol. 52 (8), April, 2015)