Legendary art restorer and spy Gabriel Allon joins forces with a brilliant and beautiful master-thief to track down the world's most valuable missing painting but soon finds himself in a desperate race to prevent an unthinkable conflict between Russia and the West.

Gabriel Allon has slipped quietly into Venice for a much needed holiday with his wife and two young children. But when Pope Paul VII dies suddenly, Gabriel is summoned to Rome by the Holy Father's loyal private secretary, Archbishop Luigi Donati. A billion Catholic faithful have been told that the pope died of a heart attack. Donati, however, has two good reasons to suspect his master was murdered. The Swiss Guard who was standing watch outside the...