Scattered Pieces by J J Burke
Having barely survived a fight for his life with an international terrorist, former covert operative Jon Morton is now plunged into a nerve-wracking quest for a killer who knows everything about him, but whom he knows almost nothing about. Jon can rely on only three people to solve this puzzle—his ex-commander, Carlos Montoto, and himself. Jon’s former commander has the resources. Jon and Carlos have only their instincts and the experience of their years as covert operatives. Their choice is singular—locate and eliminate this killer before the killer eliminates them.