Used book – Jupiter is in love, Bertrand Fichou, Eric Gasté

Victor and Jupiter are going to spend the day on the park planet! They plan to enjoy all the attractions, except for one: the Hell Star. Victor doesn't want to get into those fast-moving cabins or find himself upside down! Phew, the Groglou gives up. But now Jupiter has fallen for a Grogloute and seems ready to do anything to get her attention...