Fifty years ago, a new sanctioning body emerged at a pivotal moment in motorsports history. Racing was on the upswing. New tracks were being built all across the U.S., imported cars from Europe and Japan were flooding the market, designers were pushing limits and drivers were looking for an opportunity to race for more than just a trophy. Into this void stepped John Bishop with a fledgling organization called IMSA that offered competitive, professional racing in a friendly atmosphere and carried a new message: Racing with a Difference. In this behind the scenes book, Mitch Bishop and Mark Raffauf tell the inside story of how IMSA became a global powerhouse in just a few short years. It covers John Bishop's early life, his years at the SCCA and tells the story of how IMSA grew from humble beginnings in 1969 into the Camel GT Series, a circuit that became the most popular form of professional sports car racing in the world. Interviews with many of the top drivers, team owners, car builders and others from the era helped shape this book, which also includes hundreds of never-before-published photos. The first twenty years of IMSA's history deliver fascinating stories of vision, innovation, common sense leadership and overcoming personal tragedy. Bishop and IMSA left an enormous imprint on the racing world and changed thousands of lives. This book is a must-read, for those interested in how it all happened and in learning critical management lessons still applicable in today's motor racing world.