"Three Men and a Vampire" is a short work by Harry Turtledove, first published in the, Some Time Later: Fantastic Voyages in Alternate Worlds, by A.J. Sikes, B.J. Sikes, and Dover Whitecliff ( 2017). A preview audio version was made available here.
The story is a pastiche of Jerome K. Jerome's 1889 work, Three Men in a Boat (To Say Nothing of the Dog), but includes Professor Abraham Van Helsing from Bram Stoker's Dracula. The three protagonists of Three Men in a Boat, Jerome, George, and Harris, as well as Jerome's dog, Montmorency, encounter Van Helsing while carousing one night. Van Helsing convinces them to accompany him on a hunt for a vampire.