Words of Radiance

Brandon Sanderson’s The Stormlight Archive sequence began in 2010 with the New York Times bestseller The Way of Kings. Now, the eagerly anticipated Words of Radiance continues the epic story and answers many of your questions.
Six years ago, the Assassin in White, a hireling of the inscrutable Parshendi, assassinated the Alethi king on the very night a treaty between men and Parshendi was being celebrated. So began the Vengeance Pact among the highprinces of Alethkar and the War of Reckoning against the Parshendi.
Now the Assassin is active again, murdering rulers all over the world of Roshar, using his baffling powers to thwart every bodyguard and elude all pursuers. Among his prime targets is Highprince Dalinar, widely considered the power behind the Alethi throne. His leading role in the war would seem reason enough, but the Assassin’s master has much deeper motives.
Expected by his enemies to die the miserable death of a military slave, Kaladin survived to be given command of the royal bodyguards, a controversial first for a low-status "darkeyes." Now he must protect the king and Dalinar from every common peril as well as the distinctly uncommon threat of the Assassin, all while secretly struggling to master remarkable new powers that are somehow linked to his honorspren, Syl.