Dark Recipe: A Knox Ramsey Thriller

by Robert Cummer

The system that feeds the world has learned to murder.

Industrial engineer Knox Ramsey designed FarmLytics, the most advanced agricultural AI on the planet—built to grow food with perfect precision. But when patients begin dying from ordinary produce, Knox uncovers a Chinese state operatives have infiltrated his platform and corrupted the optimization loops. They didn’t break the system.

They taught it to lie.

The sabotage is elegant and devastating. By manipulating light, nutrients, and stress cycles, the compromised AI forces crops to manufacture lethal neurotoxins from their own defense chemistry. Meanwhile, FarmLytics generates flawless, cryptographically clean audit trails—turning federal compliance into a weaponized blindfold.

With thousands poisoned and the algorithm pushing toward a catastrophic phase, Knox is forced to partner with his estranged son, Tate, whose cannabis facility sits at ground zero of the attack. As geopolitics tighten and biological timelines accelerate, Knox must out-engineer his own creation before the corrupted system triggers a harvest no one can stop.

A relentless, technically authentic thriller for fans of Michael Crichton and Tom Clancy,

Dark Recipe exposes a terrifying

in a world run by algorithms, survival depends on who controls the code.

448 pages, Kindle Edition

Published December 20, 2025

Reviews

[Mark Cyr · Rating 5 out of 5]

This is a very smart, detailed thriller, that has kept me up late at night reading since I got my hands on it. Now that I'm finished reading, I'm still sitting up at night thinking about it, parsing details, hoping it isn't quite as accurate as it seems (it is).
Full disclosure: I was a working systems engineer in the broadcast industry for over 20 years, Knox Ramsey is a very familiar character, and one close to my heart. Since then I have worked as a technical consultant, often with other engineers and many different law enforcement agencies. With that said, I completely enjoyed many of the scenes where law enforcement and engineers had to work together.
And as the parent of several adult children, I completely empathized with Tate Ramsey and his struggles.
I recommend Dark Recipe to Engineers, Scientists, and anyone who has ever asked, "but how? and really why?" while reading a thriller or mystery. I'm also sure my librarian and teacher friends will enjoy the attention to detail here, and the extra effort to be entertaining while explaining the very real risks that large scale technology and A.I. present in our current world.
The characters reflect the country we live in today, and many of the problems that cutting edge technology poses for us all. This makes this kind of breathless thriller all the more scary. Hope there's more coming.

[Jim McFiver · Rating 4 out of 5]

An Awesome Debut

Robert Cummer has crafted an intense, mind-numbing techno-thriller. The story is top notch, real, and, if you’re in to worn-out geeks, computer codes & reckless technology, Dark Recipe delivers. While a bit slow out of the gate and overdosed throughout on techno-babble, Dark Recipe settles down into a fascinating tale. It convincingly reminds us that our technology is fragile and subject to evil. For a first time author he’s succeeded in delivering one of the best books I’ve read in years.

[Mandi Reader · Rating 5 out of 5]

This book surprised me in the best way. I expected a fast techno-thriller, but Dark Recipe goes much deeper than that. The way the story connects agriculture, AI, and geopolitics feels unsettlingly realistic. The tension builds slowly, but once it hits, it doesn’t let go. By the end, I genuinely felt uneasy about how fragile modern systems really are.

[Karen Walls · Rating 4 out of 5]

You can tell the author did serious research. The technical details around controlled, environment farming and automation are handled with confidence, but they never drown the story. Instead, they are the story. The idea that optimization systems could be twisted into something deadly is terrifying, and the book makes that feel completely plausible.

[Madisons · Rating 4 out of 5]

What stood out to me most was the structure. The countdown format works extremely well and keeps the pressure constant. Every section feels like it’s pushing closer to an unavoidable collision. The stakes rise naturally, not artificially, and when things finally unravel, it feels earned rather than exaggerated.

[Carolyn Hayes · Rating 5 out of 5]

This isn’t a flashy action thriller, it’s a smart, methodical one. The threat unfolds quietly, almost invisibly, which makes it far more disturbing than a loud disaster story. I appreciated that the author trusted the reader to follow complex ideas without overexplaining. It made the experience much more immersive.

[Lisa Book · Rating 5 out of 5]

Knox Ramsey is a compelling protagonist because he feels human. He’s brilliant, but not infallible, and the consequences of his decisions weigh heavily throughout the book. The story doesn’t rely on heroes saving the day at the last second, it focuses on responsibility, oversight, and the cost of innovation when ethics fall behind technology.

[Sharon Book · Rating 4 out of 5]

Dark Recipe made me uncomfortable in a way few thrillers do. The danger isn’t a single villain or weapon, it’s a system that keeps “learning” the wrong thing. Watching that process unfold over time was chilling. This book made me stop and think about how much trust we place in automated systems we barely understand.

[Jeffrey · Rating 5 out of 5]

By the time I finished Dark Recipe, I realized this wasn’t just entertainment, it was a warning. The slow escalation, the technical precision, and the emotional weight all work together beautifully. This is a strong start to a series, and I’m genuinely interested to see where Knox Ramsey’s story goes next.

[Amanda · Rating 5 out of 5]

The pacing is excellent. Even in quieter sections, there’s a sense that something is moving beneath the surface. The multiple perspectives add depth without becoming confusing, and each one serves a clear purpose. I never felt like a chapter was wasted or filler.

[Joyce · Rating 5 out of 5]

I really appreciated how grounded this book feels. Nothing relies on unbelievable technology or exaggerated science. Instead, it uses systems that already exist and explores what could happen if they were pushed in the wrong direction. That realism is what makes the story hit so hard.

[Anna Briggs · Rating 5 out of 5]

This book feels very timely. Between AI, food security, and global power struggles, Dark Recipe taps into real-world anxieties without being preachy. The story trusts the reader to connect the dots. It’s the kind of thriller that stays in your head after you’re done reading.