A Court of Wings and Ruin- ACOTAR Book Series (Book 3)

Feyre returns to the Spring Court to gather information as a spy for the Night Court. The story follows the build-up to the war with Hybern, including the gathering of allies, betrayal, and the final battle. Feyre and her allies fight to save Prythian from Hybern's invasion, facing loss and making sacrifices. The book concludes with the climactic war and the hope for a new era of peace.