The bestselling author of All the Shah’s Men and The Brothers tells the astonishing story of the man who oversaw the CIA’s secret drug and mind-control experiments of the 1950s and ’60s.

The visionary chemist Sidney Gottlieb was the CIA’s master magician and gentlehearted torturer—the agency’s “poisoner in chief.” As head of the MK-ULTRA mind control project, he directed brutal experiments at secret prisons on three continents. He made pills, powders, and potions that could kill or maim without a trace—including some intended for Fidel Castro and other foreign leaders. He paid prostitutes to lure clients to CIA-run bordellos, where they were secretly dosed with mind-altering drugs. His experiments spread LSD across the United States, making him a hidden godfather of the 1960s counterculture. For years he was the chief supplier of spy tools used by CIA officers around the world.