Heartland: #3 Breaking Free by Lauren Brooke
Pegasus is all Amy has left of her past, but he's steadily growing weaker. Amy's trying to care for him and hold Heartland together. She's striving to do just what her mother would have done, but everything is beginning to unravel. It will take all of Amy's courage to let go of her mother's legacy, but it is the only way that she will break free and find her own.