Dark Sisters: A Cait Reagan Novel

Boston Preternatural Investigations Unit #4

by Aoibh Wood

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.

Genres: Audiobook

373 pages, Kindle Edition

Published December 22, 2024

Reviews

[Lady Olenna · Rating 4 out of 5]

4.5 Stars

Dear future reader,

Please do not read this series in any way out of order because Book 4 has proven to be a proper mind f*ck. The movie Inception has nothing on Book 4.

The complexity of the story has wound itself over and over that my brain sometimes freezes because of how amazed I am by the author’s ability to make all these sh*t up! Like, omg, wth???? It’s hard to explain and not spoil. It takes one to experience the series to understand my astonishment.

Another thing that really made me love this series more is the justice dealt towards rapist characters. It was sooo satisfying reading about their torture and demise. As it should.

Obviously, highly recommended series. The journey of the characters is worth the KU subscription and purchase.

[Kath · Rating 5 out of 5]

Please let it continue

[Kaprina Steward · Rating 2 out of 5]

I am so confused. I’ve read all the novels and this just seems confusing to me. I had to constantly go back to the other novels to figure out who everyone was. The story seemed distant to me where the other novels seemed to connect and flow together. On top of new characters that really didn’t seem to fit and seemed unnecessary. I now hate the word “niggled”.
I really tried to like this latest novel but as it went on it just seemed like too much information.
I don’t know. This was just not as gripping as the other novels.

[Issy Waldrom · Rating 5 out of 5]

To say that things got complicated during book 3 would probably be an understatement, but that very much is the nature of the series - complex, dark, Cait's life very much messy (but in a good way for the reader), and Dark Sisters is no exception. Well, apart from being the darkest of the series so far. It is, though, very enjoyable, and I eagerly devoured my copy of the book in the space of a couple of days, and that definitely says something.

Aoife's life hangs in the balance, and the world has suddenly been shown that there is far more to it than most knew. And as to Ireland... well, that's where they're meant to be going.

There is some tying up of loose ends first, before the real meat of the story begins, and some spice, then the focus is very much of Cait, Nat and Jess, and as expected, things do not go to plan at all. This book delves more into the fae side of things, as well as explaining and expanding on the (magical) history of the worlds and certain characters. Cait is not quite who she was, which that's to be expected, with all that she had gone through, and the three of them get quite a bit of character growth as well. There is plenty of action, twists and turns along the way, and as said before, things get dark.

This is not the end of the series, with at least a couple(?) more to go, so while the overall arc for the book finishes, it does end on a cliff (and prepare to hurt during it), setting things up for the next one (which I am eagerly looking forward to). As I've said before, this series is firmly in the urban fantasy camp, and that is highlighted even more in this installment.

So yes, a very enjoyable installment to a very enjoyable and well written series, one that you can't help but get absorbed and lost in it.

[Erin F · Rating 5 out of 5]

Welcome back to the world of the PIU. Dark Sisters brings even more darkness into Cait's world. As her family continues to come together, forces are still working to tear them (and her) apart. Cait travels to Ireland to try to save Aoife and Umbra and continues to learn more about her past and the world's present. The full PIU gang isn't involved in this installment but Cait, Nastasia, Jess, and a couple of new characters (friends? maybe/maybe not) join them in their quest. Their journey packs a ton of action into a relatively short time frame. Danger, lust, love, friendship, adventure, vengeance, loss, and evolution are all present for the group. It is the darkest of the novels so far but envelops the reader in a new environment, well developed characters (new and old), and story so thoroughly that you won't want to put it down until you finish and when you do, you may curse a bit. This one hit hard on a couple of levels and is a fantastic addition to Cait's continuing story with a great plot and extraordinary character arcs that keep me wanting more.

[Charlotte Lowry Glen · Rating 4 out of 5]

Good in place.

All I can say is hurry up book 5. I need to know how this goes. Nastasia had grown on me, though very heavy-handed. Cait, as even she states. She has always come across as a bit of a whiner and had the pity me attitude. She screws something up, but it's not her fault, and she needs people to validate that, and this got truly annoying. Liz honestly deserves better. She is basically a lesbian ho-bag, and she realizes this but still doesn't really change it. I am enjoying the story, but I think the author is over complicating a lot of it now. It's starting to read like a phone book trying to remember who has what souls inside them and their names.

[Marybeth · Rating 5 out of 5]

My biases first -- I love this author and I love this series! And the book lived up to all my expectations. Cait is a complex character who I love and hate in equal measure. She has such a good heart and such an impulsive nature. Add to her the chaotic energy of the Morrigan and oh my! This book is best read after the others. The story has been building across all the novels but oh this installment is satisfying. Finding out who Cait's other sister is and how she came to be is surprising and satisfying. I could hardly put the book down and eagerly ate it up chapter by glorious chapter. If you love vampires and Celtic heritage and stories of the galaxy, this is a series for you.

[Betsy · Rating 5 out of 5]

Dark Sisters is the fourth book in the series, but it's the first one I've read. I realize now that this was a mistake on my part. Although I was able to follow the story without feeling entirely lost, I sometimes felt like I was missing the bigger picture. Despite that, I really loved the book and can’t wait to read the rest of the series in order.

I received an arc

[jr weightman · Rating 5 out of 5]

Damn.....

Ok I can see just how this author has matured as a writer. Her writing has gotten better. And her plots even better. I can't wait for then book to come out some time this year.

So go ahead and take a chance, I don't think you will be disappointed !!!!

jrwii

[Sheila · Rating 5 out of 5]

Thrilling

Action packed that leaves you wanting more. In this installment we discover new characters and old ones reunite. A cliffhanger that has you holding your breath for more.

[Selina Rossman · Rating 5 out of 5]

Phenomenal as always

Aoibh Wood has done it again! The most recent installation of the Boston Prenatural Investigations series catches the reader and refuses to let go! Another enthralling adventure for Cait Reagan with surprising twists and turns that leave you wanting more!