The Adventures of Ook and Gluk: Kung Fu Caveman from the Future is the second spin off novel of the Captain Underpants series, created by George Beard and Harold Hutchins (actually Dav Pilkey) about Ook and Gluk, two of the coolest caveboys to arrive from the Stone Age.
Ook and Gluk live happily in their hometown of Caveland, Ohio, but the ruthless former leader of Caveland — Chief Goppernopper — seeks revenge on the duo for driving him out. As his luck would have it, his descendant J.P. Goppernopper, an equally ruthless CEO from the future, arrives into the past to invade it.
With their people enslaved and the two Goppernoppers teaming up taking over the past and the future, Ook, Gluk and their dinosaur friend Lily go to a school to learn kung fu. It's up to them to learn the secret to save both worlds from the clutches of the Goppernoppers.
Contains examples of:
- Inventing the Wheel: Chief Goppernopper tries to invent the wheel and the spear and discover fire, but Ook and Gluk have already not only done it, but also implemented them in cooler ways (like a motorcycle).
- Ret-Gone: J.P. Goppernopper, after a squabble with Chief Goppernopper, disintegrates him. This causes him, his corporation, and everything he has ever built to be erased from existence.
- Vomit Indiscretion Shot: Every time Lily tries to do a kung fu spin attack, she throws up, which is always shown on-panel. She eventually puts this to use by throwing up in J.P. Goppernopper's mouth.
