The Technician: Polity 4

In Neal Asher's The Technician, twenty years after the fall of the Theocracy, the Polity rules on Masada amidst ongoing rebellion, with Jeremiah Tombs at the center of a perilous quest. As Tombs escapes confinement, his fractured mind holds hidden secrets about a long-dead alien race, prompting a tense search for answers involving war drone Amistad, a black AI, and a former rebel commander. Amidst this upheaval, a dormant space mechanism begins to stir, signaling new threats on the horizon.