As the Isle of Man celebrates 100 years of the greatest road race in the world, the TT has come full circle - as the ultimate test of both motorcycle technology and the men who pit their sophisticated machines against the cruellest circuit on earth. During that century, horsepower has soared from a handful, when two-wheelers began racing over The Mountain, to over 200 today. In this fully updated paperback edition, Mac McDiarmid tells the whole story - history, circuits, machines, riders, races and risks, as well as the whole TT experience for armies of road race fans.