Autumn with Horses — Trudy Nicholson

The girls have decided to compete at the National Grand Champion Show where an unexpected winner takes out the 'Grand Champion Show Horse' award. When they all return to White Cloud Station a mystery ride ends with a wrong turn and an overnight stay at a haunted house, where Suzy discovers a clue to the secret herd of curly-coated horses hidden in the hills behind the station. Book 6 in the White Cloud Station series. Horsecrest Press, Second Edition, 2014. There is a club for fans of the White Cloud Station books: www.whitecloudstation.com