I'm an author on the lemuriforms chapter in this edition, went through and added in ALL the updates--new species, reclassifications, new ecological info on little-studied species. I had a wonderful time, actually. Likewise in reading the other chapters! This is a great textbook from my point of view because it doubles so neatly as fast and simple reference material for higher level papers etc. while offering a more-than-usually-extensive grounding in current info for students coming into the subject.