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.