Carnival Caper: Crime Solver's Detective Agency book 3

Karrine's been busy solving mysteries and needs a vacation. So, she heads for California for a long-overdue visit with her family. Fate has another plan for Karrine as she and her family attend the State Fair, and run head on into another mystery. Someone is knocking people to the ground and stealing purses. Look out crook, Karrine, her siblings, and her cousins are in hot pursuit.