Harvestmen covers virtually every aspect of harvestman biology… Inevitably, the longest chapter is on taxonomy, dealing with the disturbing features of the families and subfamilies in the four major Opiliones suborders. This is the first major revision of the order in over fifty years, and it is a tour de force… This is a book that will be prized by many naturalists, both amateur and professional. For anyone with even a passing interest in harvestmen, it will be required reading for decades to come.