American Prometheus: The Triumph and Tragedy of J. Robert Oppenheimer is a 2005 biography of theoretical physicist J. Robert Oppenheimer, the leader of the Manhattan Project which produced the first nuclear weapons, written by Kai Bird and Martin J. Sherwin over a period of 25 years. It won numerous awards, including the 2006 Pulitzer Prize for Biography or Autobiography.

Kai Bird is an American author and columnist, best known for his works on the atomic bombings of Hiroshima and Nagasaki, United States-Middle East political relations, and his biographies of political figures. He won a Pulitzer Prize for American Prometheus: The Triumph and Tragedy of J. Robert Oppenheimer.