Boston Homicide Detective, Caitlin Reagan, walks a razor's edge, propping up her life on emotional constructs designed to help her manage grueling PTSD. She keeps her mother, boyfriend, and work separated and controlled, all in service to one horrible, tragic act she committed amid the Iraq war. But when the murder of a charity worker brings her face to face with the beautiful and charismatic philanthropist, Marcella Carson, Cait finds everything she thought she knew about her world, her life, and her very identity called into question. Sliding inexorably into an unsuspected Boston subculture, where creatures of myth and nightmare struggle to survive in a world of fading magic and proliferating public surveillance, Cait must face down her inner demons, rediscover her lost past, and catch an undead serial killer. In her first novel, Aoibh Wood explores a dark urban fantasy world through the eyes of a woman struggling to come to terms with Post Traumatic Stress, personal trust issues, and the belated realization that she is a lesbian. On the way, we meet a colorful cast of characters, from a Latino cowboy cop with a love of country music, to a ruthless vampire assassin and a retired serpent goddess with a passion for science. This book is intended for adult readers. It contains scenes of an intimate sexual nature, as well as themes and images of violence, sexual assault, and death

Two thousand years before Cait Reagan was a twinkle in The Morrigan’s eye, Weyna played handmaid to that very same Goddess in the year leading up to the Second Battle of Maighe Tuireadh, where the Tuatha de Dannan faced the forces of Fomori in a climactic final battle. But when Weyna stuns the assembled Gods and Goddesses by taking down the greatest fighter the Óșeni have ever known using a technique she never learned, she sets in motion a series of events that will ultimately lead to the discovery a long-buried secret two millennia later. In the present, Cait's sister, Aoife Reagan, a former member of Ireland’s Tacaíochta Faoi Arm, the Garda version of SWAT, is drawn to Boston for the funeral, only to find that it’s not going to happen. Cait died, but it didn’t take as Cait returned to the ranks of the undead somewhat posthumously. Unfortunately, Cait's soul has decided to go on walkabout, and she remains in a strange sort of stasis. In the meantime, Liz believes something larger is at work, and she has concocted an insane plan to draw out Cait’s killer and lead them one step closer to whoever is behind him. Aoife will impersonate Cait, leading the would-be assassin to believe they’ve failed. Now she just has to convince Aoife to be the bait, impersonate a nine-year veteran of the police department, and do it while chasing down a vicious creature of myth that is running loose in Boston and could destroy half the city.

In a land where light deceives and darkness whispers, Cait Reagan’s fight to save her sister will awaken powers—and enemies—she never saw coming. Cait Reagan is bound for Ireland, but her mission to save her sister Aoife is imperiled from the start. Even as Cait struggles with her feelings for both Elizabeth and Nastasia, she discovers the Light Fae, once symbols of benevolence, have grown twisted and cruel. The Emerald Isle feels more like a trap than a haven. Along the way, Maggie, an Army Medic caught in the chaos of Cait and Nastasia’s escape from Boston, becomes an unwilling hostage—yet something within her suggests she may hold the key to the battles ahead. Meanwhile, Doyle undergoes disturbing changes, her once-innocuous cravings turning sinister, leaving the group uneasy. Then there's Rowan, the ancient and enigmatic vampire believed to be the first of their kind, whose motives are as inscrutable as they are unhinged. But the most alarming transformation lies within Cait herself. A dark power seems to take hold, driving her to increasingly ruthless actions. Her companions, though loyal, fear the Cait they knew is slipping away, to be replaced by something far more dangerous. Haunted by an eerie echo of her own voice, whispering truths she cannot yet face, Cait must navigate her unraveling self as the lines between ally and enemy blur beyond recognition. Dark, gripping, and steeped in supernatural peril, Dark Sisters weaves a tale of light shrouded in shadow. Cait’s struggle to save her sister may cost her everything—including herself. And as the mist clears, she finds herself facing a foe she never expected.