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Critical Mass

The 6th Extinction #3 / 4
by Tara Ellis
Critical Mass (The 6th Extinction #3) by Tara Ellis
Unrated

On the precipice of annihilation, the fate of humanity hangs in the balance.

With the Earth in ruins from three catastrophic impacts, surviving the fallout was only the beginning. Unleashed from its celestial vector, the Prometheus Pathogen ravages those left behind, revealing how controlling life and death is a trait that will always be a driving force. As science advances, so does the threat of wielding that power.

Caught in the fight to access a potential cure, Kyle risks everything he has left to secure a future for his daughter, but the most lethal obstacles are those he can’t see coming. When lines are blurred, the way out may not always be straightforward.

Dallas has spent a lifetime navigating the unknown, though nothing could prepare her for the role she was to assume at the end of a civilization. Thrust into the chaos with an unlikely team, surviving will come down to her ability to trust and rely on the very thing she’s always feared.

The countdown hasn’t just begun; it’s rapidly reaching the end—the end of an epoch, the end of the human era. And it might already be too late to stop it.

The final installment of the 6TH EXTINCTION Post-Apocalyptic series from Tara Ellis! This series explores every facet of global disasters and how far people will go to survive. It's perfect for fans of Kyla Stone, Bobby Akart, Jack Hunt, and Ryan Schow.

Get it now!

Amazon: Check Best Offer

ThrillerDystopiaPost-ApocalypticSelf-published
Release date: September 9, 2025

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Tara Ellis

Tara Ellis

With over 50 published books across ten genres, author Tara Ellis is best known for her heart-pounding post-apocalyptic and thriller series. A heavy dose of mystery often underscores her character-driven plots, heralding back to what fueled her desire to tell stories from an early age.

A certified firefighter in the state of Washington, Tara volunteered as a FF/EMT for over eight years. She responded as a support officer, worked as an emergency room technician, was a 911 dispatcher, and taught life-saving techniques to the public and first responders. As an author of thriller and survival stories, she draws upon her personal experience throughout her storytelling.

Tara lives in the gorgeous Cascade Mountains of Washington State. When not writing or spending time with family, she can be found hiking the woods while plotting her next adventure.

You can find her women’s literature and mysteries written under TARA MEYERS.

The 6th Extinction

The 6th Extinction consists of three books and series is set to expand with the upcoming release of one more book. The current recommended reading order for the series is provided below.

First Impact (The 6th Extinction #1)
Unrated
Existential Threat (The 6th Extinction #2)
Unrated
Critical Mass (The 6th Extinction #3)
Unrated
The 6th Extinction Book 4 (The 6th Extinction #4)
⧗ 10.00 / 1


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