Fair Game av Stephen Leather

The eighth book in the bestselling Dan 'Spider' Shepherd series. Kidnapping is one of the cruellest crimes - lives are put at risk for cold, hard cash. But when Somali pirates seize the crew of a yacht off the coast of Africa, they bite off more than they can chew. One of the hostages has friends in high places and Spider Shepherd is put on the case. He goes deep undercover in an audacious plan to bring an end to the pirate gang's reign of terror. But as Shepherd closes in on his quarry he realises that there's much more at stake than the lives of the hostages and that the pirates are involved in a terrorist plot that will strike at the heart of London.