Horrid Henry's Underpants is a collection of four short stories that, despite the title, may not all revolve around clothing. The title story, however, likely features a classic Henry scenario involving some embarrassing or disgusting mishap related to his underpants. Henry might try to use them for a chaotic game, hide them to avoid laundry, or use them as a tool in one of his elaborate schemes. As with all Henry books, the focus is on his hilarious attempts to get out of trouble and his creative ways of annoying his brother, Peter. The book maintains the series' trademark gross-out humor and relatable domestic conflict, offering another perfect dose of Henry's chaotic and rebellious world.