Believing in Horses - Valerie Ormond

After her family moves to Maryland and her dad deploys to Afghanistan, Sadie gets a new young horse named Lucky who proves to be a handful-but all of that is just the beginning of the trouble in this young adult novel. Together, Sadie and Lucky encounter horse thieves, Maryland storms, and unwanted horses destined for auction and uncertain futures. Sadie makes it her personal mission to save these animals, meeting fellow people dedicated to rescuing horses along the way, while learning that others are driven only by greed.