Mr. Gray is a very serious man. And he is in charge of a very old, very serious museum filled to the brim with stuffed animals. Mr. Gray does not like people. He does not like children. In fact, he is most at home with things that are stuffed. So when a real live mouse decides to move into the Dead Zoo, Mr. Gray is determined that she must go. That is, until he needs her help… Another instant classic from the creator of the award-winning President picture book series.