Enigma Zero (Agent Zero Spy Thriller #17)

Enigma Zero (Agent Zero Spy Thriller #17) by Jack Mars is out now (published December 17, 2025).

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Enigma Zero (Agent Zero Spy Thriller #17)

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Enigma Zero (Agent Zero Spy Thriller #17) Release Date: December 17, 2025

Published

‘You will not sleep until you are finished with AGENT ZERO. A superb job creating a set of characters who are fully developed and very much enjoyable. The description of the action scenes transport us into a reality that is almost like sitting in a movie theater with surround sound and 3D (it would make an incredible Hollywood movie). I can hardly wait for the sequel.’
–Roberto Mattos, Books and Movie Reviews

ENIGMA ZERO is book #17 in the #1 bestselling AGENT ZERO series, from #1 bestselling and USA Today bestselling author Jack Mars (with over 10,000 five-star reviews). The series begins with AGENT ZERO (Book #1), a free download.

When a classified Antarctic base ceases communication after discovering an unprecedented seismic threat, Agent Zero and his team are thrust into an icy odyssey to halt a rogue faction’s earth-shattering plans.

With only 48 hours before earthquakes rip through the continents, Zero’s mission takes him from the desolation of Antarctica to the brink of world annihilation – can he deactivate doom in time?

The AGENT ZERO saga offers a gripping journey packed with unexpected turns and dynamic action, keeping you enthralled from start to finish. At the core of this thrilling series is an engrossing relationship between a father and his daughter, which is sure to keep you reading voraciously until the early hours.

Books #18–#24 in the series are also available!

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

‘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)
⭐⭐⭐⭐⭐

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Genre: Thriller

Jack Mars

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