Gabriel's Horn

Gabriel's Horn is a Bible-based fiction book on the biblical unicorn. What was the animal? What if it was actually a breed of horse and were to resurface today? What if its horn had the power to heal?
Eleven-year-old Callie Harrison and friend AJ Crowe discover a mystery within the attic of an Arabian horse ranch house. How are a diary and locket, found in the old Victorian, connected to a foal that will be born in the spring? Only time can reveal the answer.