The Colorless Monster is the passion project of writer and father Nathan Harms and Artist Caleb Harms, and the first in a series of children's books created by these two Harms Brothers. The story focuses on a grey Monster that is sad about not being bright and colorful like the other monsters. One night he finds his way into the room of a young child and starts to eat all of the colors he finds. In the end he learns to be happy with who he is. The book is intended to teach children about colors, but also about being happy in your own skin.