Spies of the BalkansBy: Alan Furst Salonika, 1940. To the bustle of tavernas and the smell of hashish, a secret war is taking shape. In the backrooms of barbers, envelopes change hands, and in the Club de Salonique the air is thick with whispers. Costa Zannis is the city's dashing chief detective a man with contacts high and low, in the Balkans and beyond. And as unknown ships and British 'travel writers' trickle through the port, he is a man very much in demand. Having