Edwards, Mike, 1996; Genghis Khan, National Geographic, v. 190, no. 6, December 1996, p. 2-37.
Edwards, Mike, 1997; The Great Khans, National Geographic, v. 191, no. 2, February 1997, p. 2-35. This and the above are generally good articles marred by a couple of inclusions of revisionist junk scholarship. For example, Genghis didn't massacre cities because a modern historian ''doesn't think he'd waste the time'', etc.

Cowley, Robert, ed., 1999, What If?, Putnam, 395 p. Cecelia Holland's essay, The Death That Saved Europe, is on pages 93-106. An otherwise excellent essay is marred by two inexplicable errors. She says that after the Caliph was killed by the Mongols in 1258, the caliphate was never restored (not true - it endured until 1920), and places the battle of Ayn Jalut in 1284, 25 years late.

Rachewiltz, Igor de. 1971. Papal envoys to the great khans, Stanford, Calif., Stanford University Press, 230 p.
Howorth, Henry Hoyle, Sir, 1876. History of the Mongols, from the 9th to the 19th century. 4 vols. London, Longmans, Green, and Co.
Rubruquis, William de, The journey of William of Rubruck to the eastern parts of the world, 1253-55, as narrated by himself, with two accounts of the earlier journey of John of Pian de Carpine. Nendeln, Liechtenstein, Kraus Reprint, 1967. 304 p.