"Thirteen-year-old Kate Ferris comes up with the perfect way to raise money for her autistic younger brother and others to attend summer camp--a horse scavenger hunt! As local businesses donate money and prizes, Kate keeps the entry fees in her mom's antique jewelry box. But when the jewelry box and money disappear, Kate and her friends must hold on to hope, unravel the clues, and solve the mystery along the Blue Ribbon Trail Ride"--Page 4 of cover....