K. C. Cole — a friend and colleague of Frank Oppenheimer for many years — has drawn from letters, documents, and extensive interviews to write a very personal story of the man whose irrepressible spirit would inspire many. As a young man Frank followed in his famous brother's footsteps — growing up in a privileged Manhattan household, becoming a physicist and working on the atomic bomb. Tragically, Frank and Robert both had their careers destroyed by the Red Scare. But their paths diverged. While Robert died an almost ruined man, Frank came into his own, emerging from 10 years of exile on a Colorado ranch to create not just a multimillion-dollar institution but also a revolution that was felt all over the world. His Exploratorium was a "museum of human awareness" that combined art and science while it encouraged play, experimentation, and a sense of joy and wonder.