Book excerpt: In more than a century of American Thoroughbred racing, only thirteen horses have won the Triple Crown (the Kentucky Derby, the Preakness Stakes, and the Belmont Stakes, all won in the same season). Veteran turf writer and racing historian Edward L. Bowen takes us through the rich history of one of the most formidable and exciting challenges in all of sport. Bowen covers the trainers, owners, and jockeys who etched their names into the annals of thoroughbred racing, and the “lucky thirteen” who captured all three jewels of the Triple Crown, racing’s most prestigious prize.