Ivor Herbert has written twenty-three books, of which fourteen have been about horses and racing, including the continuing bestsellers Red Rum and Arkle. He trained racehorses himself, with some success, winning the Gold Cup in 1957, the youngest Englishman to do so since the Second World War (though Vincent was younger by a year when Cottage Rake won in 1948). Ivor has been a friend of the O'Brien family for over thirty years.