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Mafia / Mob Romance

The Sinner’s Vow: A Forced Proximity Dark Mafia Romance (The Syndicate’s Vow)

MISS LANTARA

Part of the The Syndicate’s Vow series · Reading order →

SpiceDarkness

How we rate spice & darkness

  • Kindle, paperback & audiobook on Amazon
  • Spice & darkness rated — content warnings listed below

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Why we recommend it

A forced-proximity dark mafia romance where the sinner's vow becomes the only promise a ruthless man means to keep. Ruthless power plays meet possessive intensity.

At a glance

The Sinner’s Vow is a mafia romance by MISS LANTARA. It rates 4/5 for spice and 4/5 for darkness, mid-range for mafia romance: of the 931 mafia romance books we rate, 32% score lower for darkness and 24% lower for spice. Tropes: forced proximity, morally grey MC and possessive-obsessive MC. It runs to 160 pages. We have not tagged its content warnings yet, so check the author’s notes before you start.

Book details

Pages
160
Published
June 2026

The Sinner’s Vow spice level

The Sinner’s Vow 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

The Sinner’s Vow content warnings

We haven’t tagged content warnings for this book yet. If you have specific triggers, check reader reviews before you start.

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