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Expansion Pack

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Cal Bennett has a problem. Three, actually.

Enforcers with kill orders. A university under siege. And a man who should be dead—but isn't.

Cal and his friends barely escape an enforcers' ambush before picking up a lead on Karn, a murderer infected by the same alien cells that power Cal's AI implant.

The trap Karn and end it for good.

But Karn gets there first.

Trapped inside a tower along with hostages, Cal and his crew are caught in a deadly game of cat-and-mouse against the building's deadly security sentinels.

Plans fall apart.

Karn grows more unstable—and more dangerous—by the minute. To stop him, Cal will have to risk everything… including letting a madman get close enough to take control.

Because if Cal fails, he won't just lose the fight.

He'll lose himself.

Join Cal and stop a madman intent on destroying humanity.

279 pages, Kindle Edition

Published July 5, 2026

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About the author

J.N. Chaney

555 books9,731 followers
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Community Reviews

5 stars
134 (57%)
4 stars
65 (28%)
3 stars
26 (11%)
2 stars
6 (2%)
1 star
1 (<1%)
Displaying 1 - 5 of 5 reviews
257 reviews1 follower
July 10, 2026
Great Read

I throughly enjoyed this book. It had a good story line and kept me interested throughout the entire story. I recommend reading this book.
789 reviews6 followers
July 17, 2026
The problem with Byte is that this AI is unique.
Uhm!
Was.
Till Karn got onboard, though with damaged nanites and Karn does not want to die. So he needs access to Cal Bennett's AI Byte...and Cal preferably caught, incapacitated and then used by Karn.
Talk of action of the legal kind!
Infinity Upgrade : Expansion Pack by authors Rachel Aukes and JN Chaney is about to keep you wide awake as the personal war between Cal and Karn increase in inexplicable deadly encounters in an academic tower.
Enjoy
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1,431 reviews27 followers
August 2, 2026
Continues the evolution of the Callum/Byte symbiosis
Callum/Byte, Talon, and Andra have arrived at Starhaven and have enlisted the aid of Dr. Nareth to stop Karn Ferrick. They track Karn to Lumina, a high-tech city, home of Dorset, a research facility for alien life. Unfortunately, Karn has seized control of the facility and its defenses, so the team faces an uphill battle against Karn, hostile sentinels, the building’s own lethal defenses, and a deadly team of enforcers. There is non-stop action: explosions, blaster fire, AI sentinels, trigger-happy enforcers, and Karn controlling the building's defenses. An exciting read.
28 reviews
July 27, 2026
Loved this book and have been enjoying the progression of events that have occurred the principle character received an implanted APP.
3 reviews
August 1, 2026
plot

The plot is good but it moves so very slowly. Hope the next one moves along more quilt and concisely
Displaying 1 - 5 of 5 reviews