It seems we’re not the only ones obsessed with Halloween—Mike Mignola and Dark Hose have been running a 13 Days of Hellboy festival, celebrating all kinds of artwork and story reveals in the Hellboy.

And we’re officially crossing over with this exclusive reveal of Mignola’s cover for the trade paperback Witchfinder: The Mysteries Of Unland. This is the latest book in a Hellboy spin-off series that centers on Sir Edward Grey, a Victorian detective of the occult who figures in the past of the Hellboy timeline.