The Werewolf Principle by Clifford Simak

art by Ian Miller

art by Kelly Freas

 One of my all time favorite science fiction stories is Clifford Simak's The Big Front Yard. I haven't re-read it in a long time; but I may look for Simak's The Werewolf Principle first.

The Werewolf Principle (1967) An astronaut returns to Earth with two different creatures trapped inside him, so in times of stress morphs into either a "werewolf" or an impregnable pyramid.