The English Assassin — Daniel Silva

A sometime Israeli spy by trade and an art restorer by preference, Gabriel Allon arrives in Zurich to clean the work of an Old Master for a millionaire banker--only to find himself standing in his client's blood and framed for the murder.

Without warning, Allon is drawn into a spiraling chain of events involving Nazi art theft, a decades-old suicide, and a bloody trail of killings--some of them his own. The spy world Allon thought he had put aside will envelop him once again. And he will have to battle for his life against the assassin he helped train.