Deadly Sins (Riley Sullivan Mystery Book 1)

Name: Deadly Sins (Riley Sullivan Mystery Book 1)
Price: 1.99 USD
Availability: InStock
Rating: 4.5 (1838 reviews)
Author: Stacy M. Jones

by Stacy M. Jones

Contemporary Fiction Mystery Thriller

4.5 (1,838)

4.5 stars from 1,838 reviews. Top 82% of Contemporary Fiction books we track.

$1.99KU50% off peak

Last checked: Jul 2, 2026

Read free with Kindle Unlimited

Price history: $0.99 – $3.99

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Price range: $0.99 – $3.99

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Perfect for you if...

You enjoy mysteries with dual perspectives where the detective and the PI are at odds but need each other.
You're drawn to protagonists with unresolved romantic tension mixed into their professional cases.
You want a fast-paced suburban crime story with real stakes and a body count that keeps rising.

Maybe not for you if...

You prefer cosy mysteries or gentle crime fiction without graphic violence.
You need a romance subplot to be the emotional core of the book.
You dislike stories where the main character makes reckless decisions driven by past feelings.

About this book

Private investigator Riley Sullivan works to locate the missing wife of a man she once cared for and to clear him of suspicion in a series of murders. Women have been found dead in the river, and Riley believes he is innocent. Detective Lucas Morgan, the lead homicide detective on the case, opposes her investigation. Riley and Morgan have a complicated history. As they work the case, they must confront their past relationship while pursuing a serial killer operating in an upscale suburb. Riley confronts her own emotional struggles as she navigates conflicting leads, searches for the killer, and tries to avoid becoming another victim. Deadly Sins can be read as a standalone novel or as part of a series.

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Price History

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

$0.99 – $3.99

Currently on sale at $1.99 — 50% off peak. Price has dropped 5 times over the last 5 years. Goes on sale roughly every 291 days.

Sales Rank

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

Currently around #30K in the Kindle store — a steady mid-list seller. Climbing the charts — 33% improvement recently.

Rating & Reviews

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

Currently 4.5★ from 1,838 reviews

Gaining approximately 20 new reviews per month. Rating has remained stable at 4.5 over the tracking period.

Sale Prediction

Actual Predicted

This book is currently discounted at $1.99. It typically returns to around $3.99.

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.