Alexandre Dumas 
The Wolf-Leader [EPUB ebook] 

This is a werewolf tale, by the famous author of The Man in the Iron Mask, The Count of Monte Cristo or The Three Musketeers.
'It is an exciting story of a diabolical pact; more than that it is an acute and merciless study of the corruption of a man’s character by envy, and a colorful and ironic account of high and low life in rural eighteenth-century France. Like all Dumas stories it is lively, fast-moving, romantic without being sentimental, and always readable.’ ~ from the Introduction by L. Sprague de Camp
'Dumas’s most successful supernatural work by far… an entertaining historical romance based on traditional legends of the werewolf.’