
Mystery of L’Inconnu: A Thriller (Detective Remy Ferguson Thriller Mystery Series Book 1)
by Dan Grylles
4.1 stars from 757 reviews. Top 92% of Mystery Thriller books we track.
Last checked: Jun 16, 2026
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Price range: Free – $4.99
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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
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Price History
Kindle price over time. Green zones = periods when the book was free.
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.
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