Just finished "Quincey Morris, Vampire" by P.N. Elrod, which I bought from Baen in May 2001. This is a direct sequel to Bram Stoker's "Dracula" in which, at the end of the book, Texan adventurer Quincey Morris kills, and is in turn killed by, Dracula. In this book he reawakens to find that he himself has become a vampire (but a nice vampire, not a nasty one like Dracula
) and the book tells the story of how he gets back to England and tries to tell his friends (who all believe him to be dead) what happened to him.
A very good book indeed, but I'd recommend reading "Dracula" first, if you haven't already done so.