Books like Bloodraven

The forest dweller, Yhalen is captured by ogres, and surviving their viciousness, he is given to Bloodraven, the half ogre, half human war leader as a slave. Yhalen soon pays the price for offending ogre pride. But Bloodraven is no mindless beast, and Yhalen is drawn into human and ogre politics, and into forbidden magic which might mean the difference between death and salvation.