Mo Willems meets Bob Shea in this uproariously funny picture book about Gilbert the Goblin from the creator of Unicorns Are the Worst . Gilbert the Goblin is absolutely, definitely, one-hundred-percent certain that dragons are the worst. They burn down everything in sight and they hoard all the gold. They melt every ice cream cone within a mile radius, and everyone is afraid of them. But really, it's the dragons who should be afraid of Gilbert and his tremendous goblin power ...right?