Chapter book meets graphic novel in this first book in the series everyone will be talking about. Like most kids, Frankie Pickle hates cleaning his room. But what happens when his mom says he never has to clean it again? For Frankie and his unstoppable imagination, it means he and his sidekick, Argyle, can become explorers swinging on vines, forging paths through piles of clothes, and scooting past lava pits. They can perform flawless surgery on a broken action figure. They can spend time in the big house. They can even become superheroes. But when junk piles grow too high, will all this imagining be enough to conquer . . . the closet of DOOM?

Frankie Pickle's latest adventure catapults him 200 million years into the past After visiting the natural history museum with his family, all Frankie can think about are dinosaurs. He becomes so obsessed that he convinces his classmates to help him dig for bones at recess. But before they have a chance to start, the older kids chase them off the grass field, claiming they have the right to hog it because of the "Law of the Playground." Frankie isn't ready to go away without a fight, and challenges the older kids to win ownership of the field. In Frankie's imagination, it's Cavekids versus Dinosaurs in an all-out battle for the playground...that results in Frankie and his friends getting pummeled.Still determined to win back the field, Frankie invents a new game to lure the older kids away from the grass and onto the concrete area of the playground.