Nicolas Chaillan replaced 40 engineers, a team of analysts, a trading floor, and a school teacher — with AI agents running 24/7 for $200 a day. He built the system that did it. He sold it to the Pentagon. Now he's writing the book about what it means for your career, your kids, and your country.
About the Book
REPLACEMENT is the book that says what every AI insider knows but nobody will say out loud. Nicolas built AI for the Pentagon, sold Ask Sage for $250M, and now runs thirteen AI agents for roughly $200 a day — replacing the work of 40+ people.
This is not a doomsday warning. It's a solutions book — a playbook on which skills survive, how to build a one-person company with AI, how to future‑proof your career, and what to teach your kids.
Nicolas runs 13 AI agents for $200 a day. They do the work that used to require a team of forty people and over $10 million a year in salaries. That's not a thought experiment. That's his Tuesday.
Replacement tells that story — from a childhood in Marseille writing code at age 7, to becoming the first Chief Software Officer of the U.S. Air Force and Space Force, to building 13 companies and engineering a $250 million exit with Ask Sage. It's the story of a builder who watched the tools he created start replacing the people he built them for.
This isn't another book about disruption. The word is replacement — of entire teams, entire professions, entire career paths. It's happening now, and America is sleepwalking through it while China deploys.
Every chapter weaves four threads: the immigrant who coded his way out of Marseille, the builder who started 13 companies, the Pentagon insider who saw China deploying while America debated, and the father worried about the world his daughters will inherit.
"I woke up at 6 AM on a Tuesday in January 2026 and watched my AI agents finish the work that would have required a team of forty people. I made a coffee. I was scared." — From the Prologue
Who Should Read This
- → Executives and founders preparing their organizations for AI-driven workforce change
- → Military and government leaders navigating national security implications
- → Professionals and workers at risk of job displacement
- → Policymakers shaping the next decade of labor and education policy
- → Parents thinking about what skills their kids need for the future
- → If you're a founder trying to figure out what AI actually changes
- → If you care about America winning the AI race against China
- → If you're tired of AI hype and want the truth from someone who lived it
About Nicolas
Nicolas Chaillan is the first Chief Software Officer of the U.S. Air Force and Space Force, a serial entrepreneur who has founded 13 companies and built 190+ products, and the founder of Ask Sage — the AI platform for government and defense that sold for $250M in 2025.
Born in Marseille, he started coding at age 7, built his first company at 15, and came to America because he believed in meritocracy. He led DevSecOps, Cloud One, and Zero Trust architecture for the U.S. military, resigned publicly in 2021 over the AI gap with China, and now runs 13 AI agents that replace an entire staff — all while raising three daughters in Florida.
What's Inside
What You'll Learn
- → The real economics of AI replacement — not theory, Nicolas's actual costs and results
- → Which jobs are already gone, which have 18 months, and which have five years
- → Why institutions (government, universities, corporations) are the weakest defense
- → What skills survive: judgment, trust, physical presence, accountability
- → The China AI threat from someone who saw it firsthand at the highest levels
- → Concrete steps every person can take right now to stay relevant
Formats
The Replacement Map
A visual from the book showing where AI agents already replaced entire teams — not in theory, but in Nicolas's own workflow.
Note: These are sample examples — the displacement cuts across virtually all non-blue-collar professions.
Knox builds apps, tests, and deploys.
Replaces 40+ engineers.
Portfolio tracking & reporting.
24/7 analysis, no bias.
Deep dives & briefs.
Minutes instead of days.
Monitoring & hardening.
Continuous scans & alerts.
Scheduling & coordination.
Runs the command center.
Resources
Dive deeper into the ideas, data, and terminology behind REPLACEMENT. Includes a 40-term glossary, a full explainer, and a clean reading list sourced from the manuscript.
Open the Book Resources LibraryMedia & Press Hub
Nicolas's pre-book media archive and official press materials.
- → In the Nic of Time (YouTube & LinkedIn Live archive) — 197 episodes
- → Podcast, TV, and conference appearances — archive list coming
- → Book media coverage — coming soon
For press inquiries: bookings@preventbreach.com
Bulk & Corporate Orders
Bulk, corporate, military, and institutional orders are welcome. Reach out with your volume and timeline and we'll build a custom plan.
International rights — coming soon.
Book Nicolas to Speak
Invite Nicolas for keynotes, executive briefings, or closed‑door AI strategy sessions.
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