
The Navigator: NUMA Files #7 (The NUMA Files)
4.5 stars from 4,376 reviews. Top 56% of Thriller books we track.
Last checked: May 14, 2026
Full price — consider adding to your watchlist for a better deal.
Price range: $0.99 – $5.99
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Fans of these authors will like this...
- Dan Brown
- James Patterson
- Robert Langdon
Fans of these books will like this...
- The Da Vinci Code
- National Treasure: The Secret of the Forbidden City
- Treasure Island
Perfect for you if...
- You love globe-trotting thrillers with real historical artifacts as the MacGuffin, like National Treasure but on the page.
- You're a Clive Cussler fan who wants more Kurt Austin adventures after burning through the earlier NUMA books.
- You enjoy tight plotting where each chapter reveals a new location, a new threat, and momentum that doesn't let up.
Maybe not for you if...
- You prefer character-driven narratives where relationships deepen over time; this is plot-over-people entertainment.
- You want literary sophistication or psychological depth; Cussler prioritises spectacle and pacing.
- You're squeamish about violence or prefer cosy mysteries; bodies pile up and action sequences are graphic.
About this book
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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.
Price has dropped 3 times over the last 2 years. Goes on sale roughly every 249 days. Typically stays discounted for 7 days.
Sales Rank
Amazon sales rank: lower number = better selling book. #1 is the bestseller.
Currently around #79K in the Kindle store — a steady mid-list seller. Sales have softened 49% recently.
Rating & Reviews
Purple line = star rating over time. Blue area = total review count growth.
Currently 4.5★ from 4,376 reviews
Gaining approximately 61 new reviews per month. Steady word of mouth growth. Rating has remained stable at 4.5 over the tracking period.
Sale Prediction
Actual Predicted
This book goes on sale roughly every 249 days. Next drop estimated in about 30 weeks. Typical discount: 83% off.
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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