Their friends must decide which party to attend when Francine schedules her birthday party for the same day as Arthur's birthday party.

Marc Brown is the creator of the bestselling Arthur Adventure book series and creative producer of the number-one children's PBS television series, Arthur. He has also created a second book series featuring D.W., Arthur's little sister, as well as numerous other books for children. Marc Brown lives with his family in Tisbury, Martha's Vineyard.