The Book of Were-Wolves, one of the most researched works on this horrific subject. It is an historic text on the legend of lycanthropy. The author, Sabine Baring-Gould, was a parson of the Church of England, an archaeologist, a historian and a prolific author who takes a studious, nineteenth century approach to the study of this strange and terrifying mythology.
He starts the book off with a personal experience of walking alone on a country road for 10 miles at night, after villagers refused to accompany him and warned him against such folly.
If you are patient and read each detail of this amazing non-fiction work, I guarantee you will walk away with the notion that such bloodthirsty creatures did and may still exist.