Sherlock Holmes vs. Dracula: The Adventure of the Sanguinary Count
Loren D. Estleman1978

After a mysterious schooner runs aground in an English harbor with no human passengers--only the dead captain, drained of blood--a series of bizarre nocturnal crimes takes place in London. It can only be the work of Count Dracula, and only one man can save the city: the great Sherlock Holmes.