Instruct: Classify the given Amazon review into positive or negative sentiment.
Query: A great horse book!

Amy lives on a horse farm in the hills of Virginia with her mom who heals abused horses. Amy loves all horses and helps her mom. One day when Amy gos horseback riding she sees a horse in need . Soon her mom gets the horse free, but a tree crashes on the car and Amy's mom dies. When Amy wakes up shes in a hospital with her sister Lou. When Amy goes home shes sad and does not want to see her friends so she stays in her room. Bossy Lou is always around and she wants to go back to New York. Soon the sisters fight because Lou says to close Heartland down but Amy does not want it. When a shetland pony needs Amy's help Amy must believe in Heartland's miracles. This a great story about healing horses and healing hearts.