Brave knights, fire-breathing dragons, and underwear – in this comical picture book, one young knight takes on a mighty dragon to save the kingdom. With playful illustrations from the #1 New York Times bestselling artist of The Bad Seed!

Cole's wish comes true when he becomes an Assistant Knight to Sir Percival, his favorite Knight of King Arthur's Round Table. Cole learns how to ride a horse, swing a sword, cheer for Sir Percival when he goes to battle, and bandage his boo-boos when the battle is over. Cole loves practicing every skill a Knight-in-Training must master and he is determined to be granted knighthood.

Sir Percival is a great knight in every way, except for one thing: He is terrified that an Underwear Dragon will come and destroy the kingdom. But when the unthinkable happens, Cole is the only knight left standing (and just an assistant knight at that!) Cole must use all of his newly acquired skills to battle the fearsome dragon and avoid a catastrophe. Luckily, an unfortunate underwear mishap changes everything and Cole triumphs in this hilarious and triumphant tale! Kids of all ages will recognize themselves in our pint-sized hero.

Don't miss the fun and silly sequel, Return of the Underwear Dragon!