The King of Oil: The Secret Lives of Marc Rich is a non-fiction book by Swiss investigative journalist Daniel Ammann.

The book focuses on the biography of Marc Rich, a prominent international financier and commodity trader, who became a billionaire in the 1970s, arguably inventing the spot market for oil, grain, and metals.

His Switzerland-based corporation Marc Rich + Co. AG actively traded with the apartheid regime of South Africa, Iran under Ayatollah Khomeini, Cuba, Nigeria under dictator Sani Abacha, China, the Soviet Union, and later Russia.

[6][7] Indicted on some 65 criminal counts, including income tax evasion, wire fraud, racketeering, and trading with Iran during the oil embargo, Rich, nevertheless, received a widely criticized presidential pardon from U.S. President Bill Clinton on his last day in office.

"[6] A reviewer of Publishers Weekly commented "An empathetic look at the notorious Marc Rich, one of the most successful and controversial commodities traders in recent history and a key figure in the invention of the spot market...