Captain Underpants #10: and the Revolting Revenge of the Radioactive Robo-Boxers HC

George and Harold, had been turned into evil zombie nerds doomed to roam a devastated, postapocalyptic planet for all eternity. But why, you might ask, didn't the amazing Captain Underpants save the boys from this frightening fate? Lexile 890, Guided Reading Level R,, 224 páginas, Tapa Dura , 1x14x19 cms, Dav Pilkey, 5 a 8 años.