Maximum Vengeance (Grant Valor #12)

Maximum Vengeance (Grant Valor #12) by Jack Mars is a Thriller release out on May 1, 2026.

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Maximum Vengeance (Grant Valor #12)

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Maximum Vengeance (Grant Valor #12) Release Date: May 1, 2026

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

From the #1 bestselling and USA Today bestselling author Jack Mars (with over 10,000 five-star reviews) comes a riveting new action thriller series. When the world comes under threat, an elite international team is called in, designed to handle the highest of stakes and led by former Army Ranger Grant Valor.

In MAXIMUM VENGEANCE (Book #12), deep in the Arctic, humanity’s lifeline is at risk when terrorists target a vault preserving irreplaceable genetic samples. Elite operative Grant Valor braves subzero chaos, racing against time to safeguard our planet’s precious genetic heritage from annihilation.

The Grant Valor series delivers an explosive and monumental thrill-ride, brimming with twists that will shock and awe you at every turn. With a band of unforgettable characters whose gripping saga will compel you to devour pages deep into the twilight hours, fans of Brad Thor, Tom Clancy, and Vince Flynn are sure to fall in love.

Future books in the series are also available!

‘Thriller enthusiasts who relish the precise execution of an international thriller, but who seek the psychological depth and believability of a protagonist who simultaneously fields professional and personal life challenges, will find this a gripping story that’s hard to put down.’
–Midwest Book Review, Diane Donovan (regarding Any Means Necessary)
⭐⭐⭐⭐⭐

‘One of the best thrillers I have read this year. The plot is intelligent and will keep you hooked from the beginning. The author did a superb job creating a set of characters who are fully developed and very much enjoyable. I can hardly wait for the sequel.’
–Books and Movie Reviews, Roberto Mattos (re Any Means Necessary)
⭐⭐⭐⭐⭐

Reader Anticipation Rating:
[Average Rating: 5]

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Genre: Thriller

Jack Mars

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Book Club Journal: Reading Log For Adults & Kids Who Love Books!
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