Sabine Baring-Gould 
Book of Were-Wolves 

Legends of men that turn into feral animals during a full moon have persisted around the world for millennia. This is a collection of many stories from across the ages, along with an analysis and comparison of the legends and a look at some of the attempts to explain the phenomenon. Written by the famed folklorist the Reverend Sabine Baring-Gould, this is one of the ost frequently cited studies of lycanthropy.