Mary Had a Little Lion

Mary had a little lion! Its roar was loud and strong. And everywhere that Mary went, The lion would come along...
Mary brings her pet lion everywhere. But when she smuggles him into school, Mary's teacher isn't exactly pleased! She banishes him from school immediately. But before he leaves, he discovers the school library, and curls up to listen to the children read. When two thieves sneak into the library to steal the books, can Mary's lion save the day and earn his spot in school?