From a relatively modest launch in 1949, with just six races on that year's programme, the World Motorcycle Championships have progressed to a spectacular global event, witnessed by an audience of millions, as spectators or TV viewers. The roots of this Moto GP phenomenon hark back to the 1920's when the focus of British and to a lesser extent European motorcycle manufacturers was largely directed to a handful of GP circuits, with the Isle of Man generally regarded as the prime focus of their endeavours. A detailed review of that first fabulous decade with action photos and pencil portraits of the champions. A description of each race in the championship is featured, with an analysis of that year's results to make this book an item for the vintage enthusiast.