James Watson, J. Craig Venter, Francis Collins, Cynthia Kenyon . . . you may not know them, but you should. They are the masterminds of genetics and biotechnology who want you to live to be 150 years old, to regenerate your heart and brain, to create synthetic life. For better or worse, they are about to alter life on earth forever.

Award-winning journalist David Ewing Duncan tells the remarkable stories of cutting-edge bioscientists, revealing their quirky, uniquely fascinating, sometimes vaguely unsettling personas as a means to understand their science and the astonishing...