Lethal Terrain (Derek Vesper #6)

Lethal Terrain (Derek Vesper #6) by Jack Mars out on July 13, 2026.

See if this book is on Audible (Free Trial)

Lethal Terrain (Derek Vesper #6)

Countdown to launch:

00DAYS
00HOURS
00MINUTES
00SECONDS
Preorder on Amazon
As an Amazon Associate we may earn from qualifying purchases, at no extra cost to you.
Lethal Terrain (Derek Vesper #6) Release Date: July 13, 2026

Coming Soon

“Thriller writing at its best.”
–Midwest Book Review (Any Means Necessary)
⭐⭐⭐⭐⭐

LETHAL TERRAIN (Book #6) is the sixth book in a gripping new action thriller series from the #1 bestselling and USA Today bestselling author Jack Mars (with over 10,000 five-star reviews). The series begins with LETHAL FORCE (Book #1).

Former Army Ranger and ex-NASCAR driver Derek Vesper is used to high velocity, whether its wheels, wings or skis. Assumed to be KIA in a firefight, Derek, unknown to anyone, uses his unique skills as a secret government operator to work outside the scope of protocol and to embrace the most dangerous—and fraught—of missions….

In LETHAL TERRAIN (Book #6), when a deep-sea research station goes silent, Derek Vesper descends into the crushing depths in a mini-submarine. What he finds is no accident—eco-terrorists have seized control and are planning to trigger an artificial tsunami. With communications jammed and oxygen limited, the clock is ticking on mankind’s deadliest underwater chase.

The Derek Vesper series delivers pulse-racing thrills and knife-edge suspense that seizes your attention with an iron grip. Featuring spectacular action sequences and mind-blowing twists, this series will propel you through a rollercoaster ride, from dynamite openings to jaw-dropping finales. Ideal for readers who love the works of Daniel Silva, Brad Taylor, and Vince Flynn.

Future books in the series are also available!

Reader Anticipation Rating:
[Average Rating: 5]

Book Club Journal: Reading Log For Adults & Kids Who Love Books!
Book Club Journal: Reading Log For Adults & Kids Who Love Books!
Check Latest Price
We earn a commission if you make a purchase, at no additional cost to you.

Preorder on Amazon

Genre: Thriller

Jack Mars

More books from Jack Mars

Also releasing around the same time

🎧 While You Wait for Lethal Terrain (Derek Vesper #6)

Looking forward to Lethal Terrain (Derek Vesper #6)?

While waiting for release day, you can discover thousands of bestselling audiobooks on Audible.

✔ Listen while commuting or relaxing
✔ Your first audiobook is free with the trial
✔ Cancel anytime

Start Audible Free Trial

Book Club Journal: Reading Log For Adults & Kids Who Love Books!
Book Club Journal: Reading Log For Adults & Kids Who Love Books!
Check Latest Price
We earn a commission if you make a purchase, at no additional cost to you.

Recommended Book Release Guides

Similar Books Liked By Our Readers