Containing several of his horror stories, with the exception of the Creature From Cleveland Depths, the stories in Night Monsters are all of a dark and mysterious nature.
The Ace Edition of Night Monsters only contained:
The Casket Demon
The Black Gondolier
Midnight in the Mirror World
I’m Looking For Jeff
Whilst later editions contained all the stories except Casket Demon…
Night Monsters originally appeared as an Ace double with The Green Millenium