Tower of Dawn by Sarah J. Maas — book slip

Chaol Westfall and Nesryn Faliq arrive in the city of Antica to forge an alliance with the Khagan of the Southern Continent, whose armies are Erilea’s last hope. They also seek healing for Chaol's injuries at the Torre Cesme.

Yrene Towers, a healer with a dark past, is reluctant to help Chaol, but her oath compels her. As they navigate political webs and uncover secrets, they must rely on their resilience to face the dangers that threaten their world.

Sixth in the #1 New York Times bestselling Throne of Glass series.