While Arabic sources commonly refer to Paul of Aegina as the author of treatises on gynecology and toxicology, the only extant work under his name is a seven-book medical encyclopedia. Book 1 discusses hygiene and diet, Book 2 fevers, Book 3 bodily ailments described from head to toe, Book 4 skin diseases and intestinal worms, Book 5 the cure of poisonous bites and stings, Book 6 surgery, and Book 7 medicines and drugs. The most valuable book is the sixth, which contains the most comprehensive account of ancient surgical practices.