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United States of Z - Book 3: A Post-Apocalyptic Thriller

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Protocol 9 Agent’s “We come when called, serve in silence, and fall for those we may never know.”

When a viral outbreak turns most of the population into violent, animalistic predators, the agents are activated. Their to navigate the chaos, stop the enemy behind the virus, and save humanity before there’s no one left to save.

After an epic battle to save Josh Allman, Mark Moon, and Director Yorgey can’t rest—other men from Team 3 are still missing. Sent back into the dead zones, their mission takes a dangerous turn when Doctor Carter arms Moon with an untested and experimental vaccine to try on the battlefield.

The cure could save humanity…or end it.

260 pages, Kindle Edition

Published December 24, 2025

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Olin Lester

30 books36 followers

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5 stars
118 (66%)
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44 (24%)
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13 (7%)
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Displaying 1 - 5 of 5 reviews
Profile Image for Jarryd Kalideen.
422 reviews9 followers
January 24, 2026
Look, the whole "America = Freedom, the protector of the world" thing gets old, very fast.

If you read the story without noticing too much, it's all well and good. However, picking up a few things takes the gloss away. For instance, it's well known by now that the Carriers are mainly nocturnal. Considering that power is out everywhere, it would be logical that most movement happens during the day. Yes? Well, no. Most of the story happens at night, in the utter blackness. Presumably done to add more (unnecessary) high stake situations. One of them being California & Pauls boat insertion - they drive straight into a few Carriers who jump onto their boat since it's dark & they can see nothing. This ultimately leads to the death later on since again, it was still pitch black. Said death wasn't necessary & was completely avoidable.

Whilst the heroes are fighting off the Carrier hordes at the velodrome, something happens that causes a mistaken death of a civilian, due to Mark. The author then says it would be months before Mark became aware of this. Which means Mark is alive and well for at least a few months longer. Yet, the promo note for the next book asks if Mark is going to be executed. Clearly not huh.

There's no real intensity, nor does one feel the thriller aspect.
915 reviews1 follower
February 18, 2026
Book3

Book 3 was so good. Protocol 9 fought for their lives while saving some civilians. It was terrifying and exciting. I like how the story flowed. From the beginning we didn't lose many of the main characters but it was sad losing who we did. They died trying to complete their mission with honor. There was no sign of Vargo but he could've been part of an attack. We don't know. Moon did what he set out to do but now his life could be in jeopardy. We'll have to see. Overall, I'm enjoying this series and can't wait to read Book 4.
Profile Image for Jeffrey Nelson Reiland.
80 reviews
April 23, 2026
Damn.

Things are really getting interesting now. Can’t wait to read book number four. Looks like Mark and Ava have a lot of catching up and a lot of work to do.
Profile Image for jonathan sanford.
229 reviews3 followers
May 4, 2026
Brilliant

Just brilliant. The story picks up really well and takes the reader on one hell of a ride!!!
I need to read more!!
9 reviews
January 13, 2026
always a thrill ride

Olin Lester once again has written a riveting book. I enjoyed every twist and turn! Fantastic pulse pounding mind blowing thriller!
Displaying 1 - 5 of 5 reviews