Ignatius MacFarland: Frequenaut! by Paul Feig
After being teased one too many times, Ignatius MacFarland decides to build a rocket. Maybe extraterrestrials are nicer than his classmates! But when his rocket takes an explosive wrong turn, Ignatius ends up in another frequency run by former English-teacher-turned-dictator, Chester Arthur. Mr. Arthur has taken the art, culture, and advancements of our world, shared them with this new frequency, and convinced the creatures around him that he’s a genius. It’s up to Iggy and Karen, another trapped frequenaut, to expose Mr. Arthur for the fraud that he is – and to hopefully make it home alive.