To Pete, the end of the world is beginning to look like a very good thing. And all the better if it comes before Monday -- before the test and before the substitute teacher blames him for that incident with the aquarium or for stealing back his big, black, overly-friendly dog, Mishmash. How Pete solves his problems with Mishmash and the substitute teacher is a story that will tickle any young reader who has ever had difficulties with tests, teachers, or dogs.