A Court of Silver Flames (2021)

This book shifts focus to Nesta Archeron, Feyre’s sister, and Cassian, a warrior of the Night Court. Nesta struggles with the emotional scars from the war and her transformation into a High Fae. Cassian helps her train physically and mentally as they both confront their pasts and develop a slow-burning romance. Meanwhile, Nesta must tap into her mysterious power to face a new threat rising against the fae courts.