A small werewolf struggles to fit in at monster school because he isn't scary enough. Howler is a young werewolf who feels like an outcast at Monster School due to his inability to be frightening. The other monsters, with their own unique monstrous traits, seem to excel where he falters. However, when Howler encounters new companions, he begins to understand that his perceived weakness might actually be his greatest strength, leading him to embrace his individuality.

This picture book is designed to elicit laughter and delight from young readers, as indicated by its description as 'hilarious' and 'giggles on every page.' The narrative centers on a relatable theme of not fitting in, which is likely to resonate with children who feel different. The story's resolution suggests a positive message about self-acceptance and finding strength in individuality. The collaboration between David Walliams and Adam Stower promises a visually engaging and humorous experience for its target audience.