The Werewolf in Lore and Legend - Montague Summers - Bog

Unsurpassed in its sheer scope and depth, the first definitive work on werewolfery employs a theological and philosophical approach, incorporating an extensive range of historical documentation and folklore. Summers examines the supernatural practice of shapeshifting, notes the finer distinctions between werewolfery and lycanthropy, and explores the differences of opinion on exactly how ordinary humans are transformed into creatures.