Mongol Khans and their legacy.
Washington, D.C. :  National Geographic Society, 
1996.
Contents: 1260-1294. Kublai Khan, ruler of the celestial kingdom -- 1206-1227. Genghis Khan, forging an empire -- 1229-1241. Ogodei, storming into Europe -- 1246-1259. Guyuk and Nongke, rampage through Asia.