Hardwired Series by Walter Jon Williams

Ex-fighter pilot Cowboy, "hardwired" via skull sockets directly to his lethal electronic hardware, teams up with Sarah, an equally cyborized gun-for-hire, to make a last stab at independence from the rapacious Orbitals.

Solip:System begins shortly before the ending of Hardwired and continues beyond that point. In Solip:System, the main character is the computer personality Reno (a minor character in Hardwired). The author intended that this book would provide a link between Hardwired and Voice of the Whirlwind.

Steward, a clone fifteen years overdue for a brain-scan update, has no idea that the Orbital Policorp which held his allegiance collapsed, dozens of his friends perished in interstellar combat, an alien race established relations with humanity, and two wives divorced him.