Super Short Summary

Three Dark Crowns by Kendare Blake centers on triplet sisters Katharine, Arsinoe, and Mirabella, each with unique magical gifts, competing to become the queen of Fennbirn by attempting to kill one another. Raised separately in strict traditions, they face personal challenges and complex alliances as their sixteenth birthdays arrive, leading to a tense and suspenseful showdown for the throne. The book involves themes of violence and poison.