"The Book of Were-Wolves" by Sabine Baring-Gould, published in 1865. The book explores the myth and reality of werewolves, examining historical accounts and folklore. The book blends historical accounts, folklore, and analysis to explore the phenomenon of lycanthropy. It connects the myth of werewolves to real-world instances of cruelty, madness, and cannibalism, suggesting that the superstition arose from a combination of psychological and sociological factors.