The Green Man
This is one of the weirdest book covers of all time. I recall picking this up as a young teenager, around the same time I discovered James Herbert, and I thought that with the promise of ghosts and threesomes it would be more of the same bootboy Action! comix horror as The Rats or The Fog. Sadly, the book Amis wrote is not even close to the one I had, inspired by that cover, written in my head.