All her life, Boo has wanted a real live dinosaur to follow her home-and today, one did. There is only one problem-no one else can see Boo's dinosaur. Boo's older brother Sammy certainly won't put up with these crazy antics. A dinosaur? Outside the window? This has to stop! But Boo can't bear to part with her new friend yet. First she has to go to the library and find the perfect dinosaur book to read, then she has to ride around on her new friend to keep it from becoming lonely. Sammy is getting tired of all this-but then he remembers a monkey, who no one else could see, who was his friend long ago. Can he help Boo say goodbye? Newbery Medal-winning author Betsey Byars is beloved for her touching childhood stories.