The Black Stallion's Ghost

While riding the Black in the Everglades one day, Alec meets a man astride a ghostly gray mare. Alec’s fascination with the man turns to fear as he realizes the man is dangerously close to insanity. Soon Alec and the Black are caught up in a deadly chase through the depths of the Everglades, where a misstep could be fatal.
From the Trade Paperback edition.