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Enigma Zero

An Agent Zero Spy Thriller, Book 17

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Enigma Zero

By: Jack Mars
Narrated by: Brian Callanan
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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 listening voraciously until the early hours.

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

©2026 Jack Mars (P)2026 Jack Mars Espionage Spies & Politics Thriller & Suspense Exciting Polar Region
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Countdown Zero Audiobook By Jack Mars cover art
Countdown Zero By: Jack Mars
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I sure hope that Audible soon acquires the new ZERO books, I noted that there are several more in the series, I don’t see them on the pre-order list. I have not found too many series like this that interests me, but I have been going through these books by Jack Mars like they are water. I think he’s a great writer and I’ve really grown to be fond of ZERO, his family, and friends. Come on Audible, get with it!

The ZERO series rocks!

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Have enjoyed the entire series until the recent evolution. This one is the end for me. Disappointed in the far-fetched family soap opera it’s become.

nope

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The idea that hero's daughter is his leader makes NO SENSE. A 22 girl now leads a 40+ year agent with 20+ years of experience is ludicrous. Agent Zero saying YES agent spector everything time she gives him an order is not believable. The idea that both younger agents aren't following him without question is stupid.
You are making agent spector very unbelievable and starting to make the story sound "woke".

Female lead not believable

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Dislike the family interaction which detracts from the experience of the storyline so I am not going to buy any more of these - credibility is zero

The family affair aspect of secret agents just doesn't reach credibility. I'm done!

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