Cloak and Dagger (The IMA, Book #1)

Michael Boutilier is a young assassin working for a mysterious organization of mercenaries called the IMA; an organization so powerful that government denies its existence. When a hacker breaks into their computer's mainframe, they send Michael out to finish off the loose ends. But so far, there's just one lead to go on. The hacker's daughter, Christina Parker. Christina seems like any other high school senior. And she is — until she gets kidnapped by a group of people who think she's the key to the malicious code that has infected their mainframe system and she is plunged into a world where the lines between right and wrong are blurred beyond all recognition and terror knows no bounds. What do you do when the odds are against you, and the stake is your life? As she quickly learns, there are good guys and there are bad guys. Sometimes Michael's one, sometimes he's the other--but usually he's both. And right now he's the only one who can save her.