This is the cover to The Dark of the Forest, one of my recent books.
That shot on the cover is a tribute to a panel from the Mad Magazine slasher parody Arbor Day. I'm not sure that I read it in the original issue (227), I probably saw it in the 1988 Gross-Outs special. Anyway, here's the whole story (Click to make it bigger. Oooh matron!):
