John William Polidori 
The Vampyre [EPUB ebook] 

Aubrey, a young Englishman, meets Lord Ruthven, a man of mysterious origins who has entered London society. Aubrey accompanies Ruthven to Rome, but leaves him after Ruthven seduces the daughter of a mutual acquaintance. Aubrey travels to Greece, where he becomes attracted to Ianthe, an innkeeper's daughter Ianthe tells Aubrey about the legends of the vampire…