Title: April fools' rules!
Description: It's April Fools' Day and Mary-Kate and Ashley plan to go down in White Oak history as the best pranksters ever. But when they take a joke too far, they put the headmistress's job on the line.
Subjects: Twins, Juvenile fiction, April Fools' Day, Diaries, Children's fiction, Olsen twins (fictitious characters), fiction, Twins, fiction, Sisters, fiction