Dark Sisters: A Cait Reagan Novel (Boston Preternatural Investigations Unit Book 4)

Cait Reagan crosses the Atlantic to rescue her sister Aoife, only to find Ireland far more treacherous than Boston ever was. The Light Fae, long regarded as benevolent forces, have become something corrupt and predatory, and the Emerald Isle feels less like sanctuary than snare. Caught between complicated loyalties and a growing darkness she can barely control, Cait faces enemies on every front, including one that may be taking root inside her own mind.

Abby Craden navigates the emotional complexity of this fourth installment with precision, distinguishing a sprawling cast of supernatural characters while keeping Cait's psychological unraveling at the center. Her pacing matches the novel's escalating tension, pulling listeners deeper as the boundaries between ally and threat dissolve. At just over eleven hours, the runtime moves quickly, and the Irish setting gives Craden's performance added texture. Fans of the series will find this the most urgent entry yet.