Cat's claw - John Whitman

The world's most powerful leaders are gathering in Los Angeles for the G-8 summit, unaware that they have been targeted by two separate terrorist groups, each with its own lethal agenda. Uncovering and disarming one bomb would be difficult enough; eliminating both will be nearly impossible.
On the trail of a ruthless assassin, rogue CTU agent Jack Bauer doesn't know that another conspiracy is brewing around him -- a poisonous plot to violently dictate the future of the free world. If Bauer does nothing, in twenty-four hours the entire planet may be plunged into chaos, its primary heads of state ruthlessly destroyed. But if he acts, his daughter Kim will die instead.

John Whitman is the author of numerous books, including STAR WARS: GALAXY OF FEAR, as well as the more recent trading cards for 24 DAY 3. He is also extensively trained in self-defence martial arts, and has served as an instructor for US law enforcement agencies and military anti-terrorist units.