The Diabolic

By S.J. Kincaid

YA, Science Fiction

A Diabolic is Ruthless.

A Diabolic is Powerful.

A Diabolic has a single task: Kill in order to protect the person you’ve been created for.

Nothing else.

For Nemesis, that person is Sidonia, heir to the galactic Senate. The two grew up side by side, and there’s no one Nemesis wouldn’t kill to keep her safe. But when the power-mad Emperor summons Sidonia to the Imperial Court as a hostage, there is only one way for Nemesis to protect Sidonia.

She must become her.

Now one of the galaxy’s most dangerous weapons is masquerading in a world of corrupt politicians and two-faced Senators’ children, and Nemesis must find within herself the one thing she’s been told she doesn’t have—humanity. With the Empire beginning to fracture and rebellion looming, that could be the one thing that saves her and the Empire itself.


The writing in Diabolic is A+. But I couldn’t really lose myself in this book. The premise of Diabolics themselves make me a little itchy. The first chapter we meet Nemesis. She’s kept in a cage, like an animal, and Sidonia’s family comes through and chooses her like a puppy at a pet shop. She’s then taken to a laboratory and she’s introduced to Sidonia and *waves hands vaguely* science happens. But the important part is that whatever they do to Nemesis—grow her frontal lobe?—she cannot not love Sidonia. The entire premise of the Diabolics is that they don’t have a choice in these people they are bonded to. People come through and chose them and Science and then they are pair-bonded for life to this person and that never changes. Nemesis has no choice but to love Sidonia, to want to die for her to keep her safe, not because they are friends or lovers or have any sort of intimate bond, but because she has to.

So Diabolics are test tube grown, genetically modified, People who are trained and treated like animals and then when someone comes through and picks them out they are forced to love whoever is put in front of them. They are slaves and they have no choice in their lives nor in their deaths. Nemesis is fully aware that she exists only to keep Sidonia alive and healthy, but all of that is underscored by the “love” she has for Sidonia.

And I just can’t get behind any of that.

But I read through Diabolic really hoping that we’d hit a turning point that would make the first few cringe chapters pay off and…no. There’s an effort made to…do…something? There’s a sci-fi version of a dog fighting gambling ring with genetically modified animals that fight to the death for the Senators’ kids, and Nemesis feels a kinship with them but that’s as far as it goes.

It all feels very clumsy. Like, you can tell the author is trying to make this a story of love and triumph, but the whole issue of Diabolics themselves is never touched on. And it never shakes that itchy cringe feeling of the first chapters. Nemesis is a slave. She is a person who is treated as a thing, an animal, a dog. And I’m just not here for it.

There is a second book called Empress and maybe it does more to fix the issues laid out in Diabolic, but, personally, I’m not invested enough in the story to find out. The Diabolic is a well written book from a technical perspective, I just did not like how the portrayal of slavery, love, and personhood were presented. We all have our hills to die on. While I personally could not recommend The Diabolic, there are plenty other reviewers that say it’s a great read.

If you’d like to give it a go, you can find it at:

Barnes and Noble


And learn more about the author: S.J. Kincaid


3 thoughts on “Book Review: The Diabolic by S.J. Kincaid

    1. I really like her writing style and I’ll gladly pick up another one of her books, but this series is off my plate. If/when you read Empress, let me know how it compares!

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