The Vampire Diaries: Stefan's Diaries: The Ripper: Book 4 L.J. Smith
Twenty years have passed since Stefan Salvatore last saw his brother, Damon. Now, living in a remote town in England, Stefan is finally able to start over. But when news from London reaches Stefan of a brutal killer on the loose, who goes by Jack the Ripper, Stefan suspects that the murders are the work of a vampire...his brother.
Full of dark shadows and surprising twists, the fourth book in the Stefan's Diaries series raises the stakes for the Salvatore brothers as they face new loves, old treacheries, and unimaginable threats.