May I Recommend?
In case I have sparked any kind of interest in the man who became Genghis Khan, may I recommend the following:
Genghis Khan and the Making of the Modern World, by Jack Weatherford (Broadway Books, NY; 2004)
and from the other side:
The Devil’s Horsemen, by James Chambers (Atheneum, NY; 1985, originally published 1979)
Both are available through Barnes & Noble and Amazon, and I could possibly be persuaded to lend my copies if you ask.