Since turning professional in 1992, O'Sullivan has clocked up an incredible number of awards and trophies, including the UK Championship, the China Open, the Regal Championships, the Benson and Hedges Masters and the British Open. In January 2000 O'Sullivan won the Nations Cup for England, boasting the best record of any player, 13 wins from 15 frames played. Follow him on Twitter @ronnieo147
Like a lot of shy people, he can look arrogant and aloof when he is performing, while underneath there's turmoil. * DAILY MAIL * At snooker, O'Sullivan is easily the best in the world. At running, he is club class...His frank memoir, which reads like a transcript from the psychiatrist's coach, explains that running - and the running community - gave him a sense of acceptance and achievement. * THE SUNDAY TIMES * When he starts talking about snooker and his rivals, he is fascinating. Yet it wasn't snooker that ended up saving from the booze and drugs - it was distance running. * THE DAILY TELEGRAPH * Running is a chaotic race through O'Sullivan's life, but this does little to dethrone him as the people's champion - it simply adds further to his legend. * PRESS ASSOCIATION * The running is literal as well as metaphorical...it's a heartbreaking story * THE METRO *