A Court of Frost and Starlight by Sarah J. Maas is the fourth installment in the bestselling A Court of Thorns and Roses (ACOTAR) series. Set after the events of A Court of Wings and Ruin, the novel follows Feyre Archeron, Rhysand, and their companions as they navigate the aftermath of war and prepare for the Winter Solstice celebration. As the Night Court begins to rebuild, each character confronts personal struggles, lingering trauma, and hopes for the future. Blending heartfelt relationships, romance, magic, and themes of healing, resilience, family, friendship, and renewal, the book serves as a bridge between the original trilogy and the next phase of the series.