Promise Me Forever: Manhattan Ruthless

Name: Promise Me Forever: Manhattan Ruthless
Price: 0.99 USD
Availability: InStock
Rating: 4.3 (20952 reviews)
Author: Sadie Kincaid

by Sadie Kincaid

Contemporary Fiction Romance

4.3 (20,952)

4.3 stars from 20,952 reviews. One of the highest rated Contemporary Fiction books we track.

$0.99KU83% off peak

Last checked: Jun 25, 2026

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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 office romance with genuine chemistry and power dynamics that crackle on the page.
You're drawn to morally grey male leads who are ruthless in business but undone by the right woman.
You want a standalone that delivers steam, tension, and a satisfying emotional payoff without cliffhangers.

Maybe not for you if...

You prefer slow-burn romance where physical attraction develops gradually rather than consuming the characters immediately.
You're looking for workplace romances with minimal ethical complications around the boss-secretary dynamic.
You need your billionaire love interests to be emotionally available and straightforward about their feelings from the start.

About this book

Promise Me Forever is a stand-alone billionaire office romance. Drake James, a cold-hearted workaholic who avoids relationships and commitment, has a chance encounter with Amelia Ryder. Two days later, she unexpectedly appears at his office as his new secretary. Drake finds himself unable to stop thinking about Amelia—her smile, her scent, and the intimate details he now knows about her. He struggles with his attraction to her, knowing a relationship with his secretary would be unprofessional. Despite his usual detachment, he cannot stay away from her, and he refuses to give up whatever is developing between them, regardless of the complications that may arise.

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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 $0.99 — 83% off peak. Price has dropped 3 times over the last 3 years. Goes on sale roughly every 170 days.

Sales Rank

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

Currently #703 in the Kindle store — a top-1,000 bestseller.

Rating & Reviews

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

Currently 4.3★ from 20,952 reviews

Gaining approximately 1,175 new reviews per month. Reader interest is surging. Rating has dipped slightly from 4.6 to 4.3.

Sale Prediction

Actual Predicted

This book is currently discounted at $0.99. 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.

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