Cause for Alarm - Eric Ambler

Nicky Marlow needs a job. He's engaged to be married and the employment market is pretty slim in Britain in 1937. So when his fiancé points out the Spartacus Machine Tool notice, he jumps at the chance.

After all, he speaks Italian and he figures he'll be able to endure Milan for a year, long enough to save some money. Soon after he arrives, however, he learns the sinister truth of his predecessor's death and finds himself courted by two agents with dangerously different agendas. In the process, Marlow realizes it's not so simple to just do the job he's paid to do in fascist Italy on the eve of a world war.