Trust Me - Jeff Abbott, Sphere

Luke Dantry tragically lost his parents when he was a teenager - his father was murdered by a crazed operative, his mother died in a terrible accident. Brought up by his stepfather, Luke now works with him on his research, monitoring extremist groups on the internet. Yet within the seemingly harmless world of the internet lie untold dangers. And Luke suddenly feels the full force of them when he is kidnapped at gunpoint in an airport car park. As an ordinary guy, someone who has led a blameless life, he has no idea why he has been targeted. He only knows that he has to escape - somehow. But to escape he must learn to trust no one and nothing, and to overcome an enemy more powerful than he could possibly realise - an enemy who knows more than he does about the fate of his parents...