King Hereafter - Dorothy Dunnett

In King Hereafter, Dorothy Dunnett's stage is the wild, half-pagan country of eleventh-century Scotland. Her hero is an ungainly young earl with a lowering brow and a taste for intrigue. He calls himself Thorfinn but his Christian name is Macbeth. Dunnett depicts Macbeth's transformation from an angry boy who refuses to accept his meager share of the Orkney Islands to a suavely accomplished warrior who seizes an empire with the help of a wife as shrewd and valiant as himself.  

 

I'm really enjoying this, but it's very slow moving.