Duplicity: A Billionaire, Single Mom Romance (Seraph Book 2)

Name: Duplicity: A Billionaire, Single Mom Romance (Seraph Book 2)
Price: 1.49 USD
Availability: InStock
Rating: 4.4 (7921 reviews)
Author: Elodie Hart

by Elodie Hart

Romance Dark Romance

4.4 (7,921)

4.4 stars from 7,921 reviews. One of the highest rated Romance books we track.

$1.49KU75% off peak

Last checked: Jun 23, 2026

Read free with Kindle Unlimited

Price history: $0.99 – $5.99

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Price range: $0.99 – $5.99

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Perfect for you if...

You love dark, morally complex billionaire romance where the power dynamic is messy and complicated rather than straightforward.
You're drawn to single-parent protagonists with real stakes and maternal motivation that drives the entire plot forward.
You want spicy, explicit scenes woven into emotional character arcs rather than romance that glosses over the physical side of relationships.

Maybe not for you if...

You prefer romance with lighter heat levels or fade-to-black intimate scenes.
You need your heroes to be fundamentally good people without morally questionable histories or current behaviour.
You're looking for a cosy, feel-good read without the angst of deception, exploitation, or deeply uncomfortable power imbalances.

About this book

A single mother desperate to save her daughter's life from a life-threatening heart condition accepts a "full-service" executive assistant position through the discreet agency Seraph. The role requires her to work for Brendan Sullivan, a ruthless and wealthy billionaire with a reputation for exploiting women in her position. Sullivan is handsome, wealthy, and demands increasingly depraved acts from her. She must hide her true identity as a struggling single mother, presenting herself as a professional. She fears his touch and that of his associates, yet finds herself falling for him as he corrupts her. She struggles with the knowledge that any genuine connection between them is impossible, even as the arrangement begins to feel like more than a means to an end. Duplicity is a billionaire romance featuring the following elements: single mom, inexperienced female main character, reformed playboy, and workplace romance.

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Price History

Kindle price over time. Green zones = periods when the book was free.

$0.99 – $5.99

Currently on sale at $1.49 — 75% off peak. Price has dropped 3 times over the last 18 months. Goes on sale roughly every 125 days.

Sales Rank

Amazon sales rank: lower number = better selling book. #1 is the bestseller.

Currently around #11K in the Kindle store — a steady mid-list seller. Sales have softened 319% recently.

Rating & Reviews

Purple line = star rating over time. Blue area = total review count growth.

Currently 4.4★ from 7,921 reviews

Gaining approximately 619 new reviews per month. Reader interest is surging. Rating has dipped slightly from 4.6 to 4.4.

Sale Prediction

Actual Predicted

This book is currently discounted at $1.49. It typically returns to around $5.99.

Prices shown in USD from Amazon US. We continuously pull new data to improve tracking. If dates look old, it usually means there has been no significant change since the last data point.