Mystery Rider

In the third installment in the Horses and Friends series, thirteen-year-old Kate Ferris already has one problem. Snooty, well-to-do Melissa is boarding her horse at Kate's family stable. When Melissa suddenly turns nice, Kate is shocked ... and suspicious.
The last thing she needs is more trouble. So when a hooded rider appears—and then disappears—on a stunning black horse outside her home, Kate isn't sure if Melissa is playing a trick or something more dangerous is going on. Either way, Kate and her friends will need an extra measure of faith and courage to solve this mystery.