Monster Mess — Lewis Trondheim

Peter and Jean are two kids who discover they can do something impossible--when they draw a monster on paper, it comes to life! First they create a monster named Oko, who jumps off the page and proceeds to make one huge monster mess! There can be only one solution: draw a good monster. That's where Kriss comes in. With three legs, four arms and ten mouths, can he defeat Oko? Things can only get a whole lot messier!