Quick recap
A year later, the Fused invade Urithiru and the tower loses its defenses. Navani, a prisoner, studies light with the Fused Raboniel and discovers a light that can destroy Fused and spren for good. Kaladin, pulled from the front, holds out alone in the occupied tower alongside Teft, who dies. Shattered, he gets a vision of his brother Tien, swears the Fourth Ideal and saves his father, Lirin. Navani bonds the tower's spren, becomes a Bondsmith and kills Raboniel at her request. In Shadesmar, the honorspren acquit Adolin. Shallan pulls her personas together. Taravangian kills Odium's vessel and takes his place. Dalinar sets a contest of champions with Odium.
No spoilersOpens once you mark the title as seen.