Finn Caspian and Explorers Troop 301 dive into the belly of a planet-sized alien.Explorers Troop 301 has explored a lot of planets hoping to find a place to call home. But their latest mission feels like the most boring ever - until they get chased by giant ANTibodies straight into the planet's open mouth! Uh-oh! This planet is really a ginormous, planet-sized alien and the explorers are her lunch! Can Finn and his friends make it through all thirty-five stomachs, battle an army of ants, out-whiz a super-computer in a deadly game of trivia, and find a way out? Or are they doomed to be part of the planet's balanced diet?