Jane Smiley 
Mystery Horse [EPUB ebook] 

When Abby Lovitt gets to work at her family's ranch, she can hardly believe her luck. True Blue is a beauty, a dapple grey, and he needs a new home – his owner was tragically killed in a car crash, and no one has claimed him. Her father is wary, as always. But Abby is smitten. True Blue is a sweetheart, and whenever Abby calls out, "Blue, Blue, how are you?" he whinnies back. But sometimes True Blue seems, well . . . spooked. He paces, and always seems to be looking for something. Or someone. Abby starts to wonder about True Blue's owner. What was she like? What did she look like? And what are the strange whispers Abby sometimes hears when she's with him?