Healing Horses, Healing Hearts - Volume One:
Heartland is where Amy, Lou and their grandfather live. Oh and I can't forget Ty the stable hand (and becomes Amy's boyfriend in one of the later ones.)
Later in the books, Ben the second stable hand comes to learn their ways @ heartland. Amy's mother dies in a car crash when a horse is stolen then abandoned by the thieves. Amy and her mother go to rescue him but he is scared of the thunder and lightning that have come with a huge storm. The roads are wet and unsafe. Her mother dies in the accident and Amy's sister, Lou, comes from New York and tries to help but...
Oh sorry for telling too much, if you wanna find out about Amy. Look for Heartland it will fill your... heart :)