A young boy named Bobby has the worst teacher. She's loud, she yells, and if you throw paper airplanes, she won't allow you to enjoy recess. She is a monster! Luckily, Bobby can go to his favorite spot in the park on weekends to play. Until one day... he finds his teacher there! Over the course of one day, Bobby learns that monsters are not always what they seem.

Each page is filled with "monstrous" details that will have kids reading the story again and again. Peter Brown takes a universal and timeless theme, and adds his own humorous spin to create another winner of a picture book.