The critically acclaimed, internationally bestselling Tom Marlowe series returns!They tried to bury the past. Now the past is burying them.Tom Marlowe's partner Trix Preston hasn't mentioned Operation CASTLE ROCK in five years. She doesn't need to – it was pre-MI5 hacking work, corporate espionage to pay off a debt, nothing worth remembering.Until three GCHQ analysts connected to CASTLE ROCK turn up dead across Europe, one every seventy-two hours.Someone is eliminating everyone who knew about th...