The Vienna Connection (Unabridged‪)‬

Former intelligence expert Darren Priest tries to distance himself from his old life, and turns to a new vocation as a wine and food writer. He soon discovers that with his background, some things you can't un-volunteer for. 

Sent to Austria by the US President, Priest undertakes a covert mission where friend quickly turns to foe. With numerous enemies threatening his mission, can Priest figure out whom to trust - and expose the Vienna Connection?