On a school sleepover at the museum, massive farts bring the dino exhibits to life! Now the powerful superhero Fart Boy and his friends must stop the rampaging reptiles--and his nemesis Professor Gravypants' evil plan--before it's too late. A hilarious sequel from the New York Times bestselling author of Mighty Dads. Fart Boy and his friends have found themselves in the midst of a dino-size disaster. Thanks to a potent combination of garbanzo beans and peanuts, their collective farts have awakened ancient dinosaur bones on their overnight museum trip. Now Fart Boy and his friends must solve a series of riddles to find the missing bones and restore order. If they fail, Professor Gravypants will hunt the dinosaurs for his evil fart schemes. Or worse--the kids will become the dinosaurs' next meal! New York Times bestselling author Joan Holub reteams up with celebrated cartoonist Rafael Rosado on this hilarious superhero sequel to Fart Boy and Reeky Dog that celebrates friendship and most importantly, the true power of farts to save the world!.