Piper at the Gate

Piper at the Gate is also known as Piper at the Gates of Dawn (UK edition).

His mother, lead mare of all the Appaloosa breed, is murdered. His father, the Dancer, the Heavenly Horse from the Outermost West has lost his soul hunting for his mate in the mists of the Havens. Now it's up to the sonto rescue the spirits of his sire and dam. If Piper, forced to battle against almost insurmountable odds, can defeat the Dark Horse and his evil, the soul of The Dancer and his consort will be freed. But if Piper loses, all horses may disappear from the mortal world – forever.