I was thinking about this story and decided to have a little fun with it. Here are a couple of sketches I came up with while being a bit nostalgic.
Space Monsters are typically not very well endowed. Just so you know. This was a detail I left out of the original text.
This is a little closer to the original book. I did add the hat....and I think the original Space Monster was a bit hairier. He is sort of like the Abominable Snowman in Bugs Bunny cartoons, except that the Abominable Snowman didn't get blasted with a ray gun.
Hope you like my little trip down memory lane.