For decades Peter O'Sullevan was one of the iconic sports commentators, providing the soundtrack for half a century of horseracing as he called home such legends of the sport as Arkle, Nijinsky, Red Rum and Desert Orchid. His rapid-fire commentary seemed to echo the sound of horses' hooves, and it was not long before he became known as 'The Voice of Racing'. But in addition to his legendary status as a TV personality, Peter O'Sullevan was also a notable journalist and much-admired writer, and it is a measure of his standing both within and beyond the world of racing that his compulsively readable autobiography 'Calling the Horses', first published in 1989, reached the top of the Sunday Times non-fiction bestseller list.