Technical Abstract: This is a review of the book Harvestmen by Pinto-da-Rocha et al (eds.), which is a wonderfully balanced and staggeringly complete treatment that covers the gauntlet of taxonomy and systematics, internal physiology, ecology, and behavior of Opiliones. In addition to the breadth of material presented in Harvestmen, the depth of information was also impressive. Both the chapter authors and the editors should be commended for their efforts. The bottom line is that there simply isn’t very much information written about Opiliones, but what has been done is with few exceptions recorded and synthesized within broad context in Harvestmen. Entomologists, both graduate students and hardened veterans alike, would benefit strongly from having this text on their shelf.