In this, the first full-length study of the Directorate of Science and Technology, Jeffrey T. Richelson walks us down the corridors of CIA headquarters in Langley, Virginia, and through the four decades of science, scientists, and managers that produced the CIA we have today. He tells a story of amazing technological innovation in service of intelligence gathering, of bitter bureaucratic infighting, and sometimes, as in the case of its “mind-control” adventure, of stunning moral failure. Based on original interviews and extensive archival research, The Wizards of Langley turns a piercing lamp on many of the agency's activities, many never before made public.