The Way of Kings: The Stormlight Archive, Book 1 Part 2

One such war rages on a ruined landscape called the Shattered Plains. There, Kaladin, who traded his medical apprenticeship for a spear to protect his little brother, has been reduced to slavery. In a war that makes no sense, where ten armies fight separately against a single foe, he struggles to save his men and to fathom the leaders who consider them expendable. Brightlord Dalinar Kholin commands one of those other armies. Like his brother, the late king, he is fascinated by an ancient text called The Way of Kings. Troubled by over-powering visions of ancient times and the Knights Radiant, he has begun to doubt his own sanity.