Sci-Fi / Alien Dark Romance
Fathom: A Dark Fantasy Romance Space Opera (Leviathans Book 1)
Book 1 in the Leviathans series · Reading order →
SpiceDarkness
- Kindle, paperback & audiobook on Amazon
- Spice & darkness rated — content warnings listed below
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Why we recommend it
Leviathans rise in this dark fantasy space opera romance, where the deep holds monsters and the heart holds even darker desires. Expect sweeping scale, a brooding protector, and a slow-burning bond forged in the crush of impossible stakes. For readers who love their romance epic, their heroes monstrous and devoted, and their worlds vast enough to lose themselves in. Atmospheric, intense, and gorgeously grim.
At a glance
Fathom is a sci-fi romance by Deiri Di. It rates 4/5 for spice and 4/5 for darkness, mid-range for sci-fi romance: of the 403 sci-fi romance books we rate, 47% score lower for darkness and 30% lower for spice. Tropes: dark protector, forced proximity and slow burn. 2 content warnings are listed below, hidden until you tap.
Book details
- Published
- June 2026
Fathom spice level
Fathom is rated 4/5 for spice on Readark’s scale: explicit and frequent, meaning multiple detailed scenes, with heat central to the story. Its darkness rating is 4/5: heavy, meaning sustained cruelty, trauma or non-consent central to the relationship. How we rate
Fathom content warnings
We list 2 content warnings for this book. They stay hidden until you tap, so you can check without spoilers.
Content warnings (tap to reveal)
- Blood / Knife Play
- Graphic Violence
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