Aethyr by Sean E. Kelly
If you copy your mind, your memories, your sins…are they still yours?
One day in Pittsburgh, Paddy Riordan died...his body did, anyway. His digitalized mind wakes up in a world where nothing is what it seems, his memory fragmented. When a stranger calling himself the Varyag appears with a dire warning, Paddy must piece together his broken past to save his mind and the woman he loves, all while eluding masked assassins, cutting-edge artificial intelligence, and the sinister sorceress Rusalka.
But he’ll find no enemy so cruel as the shadow of the past. What he discovers may condemn him to a fate even worse than death.