Istanbul Express: Book 5 by T. Davis Bunn
As the Iron Curtain descends across battle-scarred Europe, American foreign policy races from crisis to crisis. With Stalin on the move, there's only one hope -- a strategy of containment to draw a defense against Communist expansion. At this moment in time, Jake and Sally are dispatched to Istanbul to oversee a massive aid program. Amidst murky Byzantine alleys, and magnificent domes and minarets, the couple is thrust into a hotbed of international intrigue the likes of which they'd never imagined.