In the follow-up to 2018's Heart of Thorns, sworn enemies Mia Rose (newly back from the dead) and fierce Pilar d'Aqila (who killed her) are dealing with the aftermath of political turmoil in the kingdom of Glas Ddir. Young Prince Quin, once betrothed to Mia Rose, is now a hunted man after losing all support. New alliances must be built as more magic emerges from the Gwyrach, mixed-raced female mortals descended from the gods. Letters from the mysterious Angelyne, presented in "handwritten" font on specially designed pages resembling old stationery, drop hints while counting down the passing of time up until the Night of the Weeping Moon. The last letter, dated from that anticipated night, satisfyingly pulls all the threads together. Barton's action-packed sequel won't stand alone; there are so many plot twists that a solid knowledge of the first book is essential to follow the story. But those who enjoyed the previous title's fiercely feminist tone and proactive women will be delighted.