The Conqueror series

Young Temijin, of the Wolves tribe, is abandoned on the harsh Mongolian plains, but survives. He gathers together a new tribe and dreams of uniting the warring tribes together under one leader. X rated, contains graphic violence.  Book 1 of series

Genghis Khan confronts the Chin in the city of Yenking. They are confident and brave, setting a trap for the raiders, but Genghis will not give up.  Book 2 of series.

Genghis Khan has united the warring tribes but now finds trouble brewing west of the Mongolian plains so he sends his sons out to quell the rebellions. This also serves to diffuse the rivalries between his sons and shows him which should succeed him.  Book 3 of series.