When it comes to Thoroughbreds, Arthur B. Hancock III has courted the bastard. Never much for floating the mainstream, he has celebrated in many a winner's circle, while knowing firsthand how wild oats can almost drown a man in a barrel of despair. If Mr. Hancock had not been an accomplished horseman or musician, he would have made one hell of a history professor. In the aptly-titled, just-published Dark Horses: A Memoir of Redemption, the author has penned something truly special--a reflection which looks back on a life well-lived. The...