Mystery of L’Inconnu: A Thriller (Detective Remy Ferguson Thriller Mystery Series Book 1)

Name: Mystery of L’Inconnu: A Thriller (Detective Remy Ferguson Thriller Mystery Series Book 1)
Availability: InStock
Rating: 4.1 (757 reviews)
Author: Dan Grylles

by Dan Grylles

Mystery Thriller Thriller

4.1 (757)

4.1 stars from 757 reviews. Top 92% of Mystery Thriller books we track.

Published by Whisper Writer PressPublished 2023-01-01

FreeFree100% off peak

Last checked: Jun 16, 2026

Price history: Free – $4.99

Buy now — it's free!

Price range: Free – $4.99

Buy on Amazon - Free

0 readers are tracking this book's price

Fans of these authors will like this...

Louise Penny
Tess Gerritsen
James Patterson

Fans of these books will like this...

The Girl on the Train
And Then There Were None
The Silent Patient

Perfect for you if...

You enjoy locked-room mysteries where the setting itself becomes a character and escape feels impossible.
You like procedural thrillers with a detective protagonist who gets personally invested in catching their suspect.
You appreciate multiple victims and layered motives that keep you guessing until the final reveal.

Maybe not for you if...

You prefer standalone thrillers over series openers, since you'll want to know what happens to Ferguson next.
You find confined settings (ships, islands, closed compounds) claustrophobic rather than compelling.
You're after psychological character studies; this is plot-driven investigation first.

About this book

Detective Remy Ferguson, Miami's best detective, is called to investigate a series of deaths aboard the luxury super yacht L'Inconnu. What begins as guests visiting the infirmary under unusual circumstances escalates when an unexpected storm passes, leaving death in its wake. Ferguson and his Miami Dade team must determine whether the multiple murders resulted from a drug smuggling deal gone wrong, retaliation against wealthy passengers, or something more sinister. As each lead fails to identify the killer, Ferguson suspects someone is deliberately staying one step ahead of him. To catch the elusive criminal, he must confront a dark and twisted evil that threatens his own life.

Get the best deal every time

We track price drops, sale patterns, and predict when this book will go on offer next.

Price History

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

Free – $4.99

Currently free. Price has dropped 5 times over the last 3 years. Goes on sale roughly every 112 days.

Sales Rank

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

Currently around #632K in the Kindle store — a niche title. Sales have softened 29% recently.

Rating & Reviews

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

Currently 4.1★ from 757 reviews

Gaining approximately 22 new reviews per month. Steady word of mouth growth. Rating has dipped slightly from 4.8 to 4.1.

Sale Prediction

Actual Predicted

This book is currently free. Grab it while you can.

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.