When does A Court of Thorns and Roses return?

A Court of Thorns and Roses is a new adult high fantasy novel series by American author Sarah J. Maas. The story follows the journey of mortal Feyre Archeron after she is brought into the faerie lands of Prythian for murdering a faerie. The series appeared on the New York Times Best Seller list and has been optioned by Hulu for a television series adaptation.