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Full Circle was first published on September 30, 2002. Due to low series sales, it was meant to be the final Sweep book. However, fan petitions and letters to the series' packager, Alloy Entertainment, led to the "Super Special", Night's Child.
Morgan begins sleep-walking in life-threatening situations and begins having visions of the late Cal Blaire trying to kill her. Meanwhile Hunter is faced with a decision of whether or not he wants to work for International Council of Witches anymore. Morgan discovers that she is the Sgiùrs Dàn, a very powerful witch born every few generations that changes the course of her clan. The two soon find themselves battling an enemy they thought was dead.
The story ends with Morgan boarding a plane to Scotland to join a Wiccan school. Hunter gives her a silver claddagh ring as a symbol of his love and devotion to her, and they make love at Beltane.