Ook and Gluk, two caveboys from the Captain Underpants universe, travel through time and learn kung fu to fight an evil corporation.

Dav Pilkey mixes comics, jokes, misspellings, and action so the adventure feels like a child's wild notebook come alive. The focus stays on The Adventures of Ook and Gluk Book's own material, so the description explains what the reader actually meets on the page.

The book turns friendship and silliness into rebellion against bullies, greed, and adults who misuse power. That gives the reader a clearer sense of the subject, structure, and practical or imaginative value of the book.