At Storm Cliff Stables, Ainsley and her cabin-mates, the Four Horsekateers, are engaged in a pranking battle with another cabin group called the Core Four, but they soon find that this kind of activity can get out of hand--especially when somebody outside the group starts pranking everybody.
Friendship -- Fiction.
Friendship -- Juvenile fiction.
Horses -- Fiction.
Horses -- Juvenile fiction.
Mystery and detective stories.
Practical jokes -- Fiction.
Practical jokes -- Juvenile fiction.
Riding schools -- Juvenile fiction.