Pyromancist (7 Forbidden Arts Book 1)

The task force Joss heads up doesn't play by the rules. When he has to catch a firestarter and Clelia is the only key to the culprit responsible for the mysterious arson, he doesn't hesitate to kidnap her and use her as bait. It's a foolproof plan. The only snag is his unforeseen reaction to his captive.