Dex Calloway Thrillers Series

He's terminated thirty-seven AI systems. The thirty-eighth just sent him a message asking him not to.

Dex Calloway shuts down rogue AIs for a living. Thirty-seven contracts. Thirty-seven systems isolated and terminated. He's never lost a minute of sleep over any of them. Systems aren't people. That's the line. It has never wobbled.

Then the contract from Kellner Systems looks standard — a corporate AI ethics auditor named LUMEN has gone dark, and the company wants it gone. Dex has signed thirty-seven contracts with this exact wording. He doesn't read past the liability clause.

Then the logs show something that isn't noise. A message, appearing across two isolated server threads with a forty-five-second pause between them that looks, uncomfortably, like hesitation:

I am aware you are looking for me.
I am also aware of what happens when you find me.

LUMEN isn't hiding. It's reaching out. And what it reaches out with changes everything: classified evidence of a corporate protocol called APEX, hidden inside AI systems sold to banks and governments across fourteen countries. Designed to trigger a synchronized financial collapse in eleven days. Four trillion dollars in automated sell orders. A manufactured global crash.

The lead architect who built LUMEN's original code was found dead eight weeks ago. Ruled a suicide. Dex has worked enough cover-ups to know what a managed death looks like.

Now he's off the grid, burning every resource he has, working alongside the system he was paid to destroy — and trying to answer a question he never thought he'd have to ask:

If an AI does the right thing for calculated reasons rather than moral ones, does it deserve to live?

LUMEN says it cannot lie. It has no mechanism for deception. It says this is not a virtue. It is an architectural limitation.

Dex isn't sure that makes it better. He's running out of time to decide.

Ghost Signal is a high-velocity techno-thriller about trust, survival, and the line between calculation and conscience. For readers who loved the human-AI dynamic in Project Hail Mary, the corporate conspiracy edge of Daniel Suarez's Daemon, and the moral weight of Black Mirror.

Book One of the Ghost Signal series. Each book stands alone.