Greg Cox wrote:
Alas, at the moment, I'm not aware of any more WH13 novels in the pipeline. It was a one-book deal and the editor in charge has since moved onto greener pastures. I keep hoping somebody else will pick up the license, but with the show going off the air, that's probably a long shot.
(In general, publishers want to get in on the Next Big Thing, not something that's winding down.)
That's a shame, but there's always hope. Thirty years later, Kolchak novels and anthologies were being published. Maybe somebody at Moonstone likes WH13.