Within the Colobinae, the genera Rhinopithecus (snub-nosed monkeys), Pygathrix (douc langurs) and Nasalis (proboscis monkeys and simakobus) are informally grouped as the odd- nosed monkeys. While these genera comprise an eclectic mix featuring remarkable natural histories, this ecologically diverse group previously received little attention from the scientific community. In the last decade, however, a plethora of new and exciting research has occurred on these understudied colobines. In this book, we present a summary and synthesis of this new knowledge, looking to compare across taxa and...