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As the leader of the Secret Circle, Cassie is faced with impossible choices and new dangers at every turn . . . and one wrong move can break the Circle apart forever. Now, as Cassie battles her evil half sister, she faces a new and terrible danger. Black John's curse has been unleashed on the Circle, and it is up to Cassie to set things right. As Cassie's heart is tested once more, she is forced to finally choose between Nick and Adam, and she faces the ultimate test of her power in this gripping showdown between good and evil.