"Safely returned to their correct time, the boys promised never to open The Book again, but the temptation to look inside the magical tome was too great, and the boys were to have many more misadventures in time and space -- meeting such people as Napoleon, Genghis Khan, Leif Erikson, Sacagawea, the Mayan High Priest of Chichen Itza and a Neanderthal named Duh." . . . .