This is book 1 of the "The Corporation Wars" series.

This note contains spoilers for the book.

Start of a 3-book series. Fascinating AI future, with other extropian themes like simulation and upload.

Carlos the Terrorist is kind of pressured into committing an atrocity during the Rax vs. Axe war. And wakes up in a simulation, where he is going to be used, it develops, to combat self-waware robots as penance for his atrocity.

If of course he can believe anything he hears, sees, or feels, which he can't.