A Court of Frost and Starlight is the first novel in the A Court of Thorns and Roses series by Sarah J. Maas (not considered the fourth book in the series). It was published on May 1, 2018. It takes place after the events of A Court of Wings and Ruin and is told from the perspectives of Feyre and Rhysand. The novel acts as a prequel to the spin-off novels.
The novel also contains a preview of the upcoming novel, A Court of Silver Flames, which features Cassian and Nesta as the main characters.
Some alliances remain dangerous (recruiting monsters to fight monsters is always a risky proposition) and double agents abound. The supporting characters' romantic stories intertwine with strategizing and even warfare, blending the expanded world with extended action sequences and character reveals, and the ramifications of the conclusion will be felt in future installments.
Sarah J. Maas is the #1 New York Times and internationally bestselling author of the Throne of Glass, Court of Thorns and Roses, and Crescent City series. Her books have sold more than nine million copies and are published in thirty-seven languages. A New York native, Sarah lives in Pennsylvania with her husband, son, and dog.