Signal (Sam Dryden Series, Bk. 2)

Ex--Special Forces Sam Dryden lives quietly in a small coastal California town. But his peaceful existence is shattered when he receives a phone call from an old friend in trouble—and now there’s no turning back.

FBI agent Marnie Calvert is called to a horrifying crime in the Mojave Desert. When the investigation leads Calvert to Dryden, the two find themselves caught up in a generations-long conspiracy that’s finally coming to fruition. Now they must face down a phantom network whose technology can affect events before they even happen…and is bound to result in the death of millions. To defeat it, Dryden will need to do more than think fast: He must find a way to outsmart a ruthless enemy that can seize on his mistakes before he even makes them. And time is running out…