Alistair Stuart MacLean (Scottish Gaelic: Alasdair MacGill-Eain; 21 April 1922 – 2 February 1987) was a 20th century Scottish novelist who wrote popular thrillers and adventure stories. His works include The Guns of Navarone, Ice Station Zebra and Where Eagles Dare – all three were made into popular films. He also published two novels under the pseudonym Ian Stuart. His books are estimated to have sold over 150 million copies, making him one of the best-selling fiction authors of all time.