The Killing Ploy

Pablo de Silva was once a top tracker and shooter in the CIA's elite Eyes and Ears Unit, whose work includes surveillance and killing.
But that was before Berlin.
On a Berlin mission, he lost his nerve and failed to save the life of a fellow agent and lover.
Tormented by this, sick of violence, held now in low regard by colleagues, he's transferred to a cushy job in Guatemala City. One day his former mentor/head of the Unit calls him home with a new assignment. Liaise with an FBI counterterrorism expert in San Diego and see if the murders of two top Defense Department military contractors, headquartered in that city, have any European terrorist connection. If so, his mentor's Unit will take over.
The task seems straight forward to de Silva. Off to San Diego and beyond, he goes, not realizing he's slipped into a world where appearances can deceive. Who are his real allies? Does he have more enemies than he thinks? Should he watch his back as well as his front? Not until the shocking conclusion of his mission does he find out. And not until the end do his allies discover Pablo de Silva is much more than he seems.