"Who would win a head-to-head battle: Alexander the Great or Genghis Khan? Now readers can find out with this installment in the Head-to-Head series that mashes up famous conquerors from throughout history. Each of the 20 conqueror profiles features a brief biography, color illustration, and a sidebar of rankings in key categories. Friends flip to random pages and then "battle" one another in a chosen category. Covers the military history from antiquity to Napoleon."