BMW M achieved spectacular victories on all the world's famous racing circuits. The brand also stands for a wide range of innovative high-performance limousines, many of which have achieved cult status and a high collector's value. This powerfully written volume describes the 50 years of BMW M and shows what lies behind the "most powerful letter in the world". The lavishly illustrated publication describes historic milestones in motor sport and presents outstanding models. The success of BMW M is narrated from different angles, describing the progressive improvements in chassis technology and providing insight into the teams of experienced test and racing drivers as well as the innovative developers and engineers. And finally the inclusion of electromobility sets the course for the brand to move forward into the future.