The Greek Symbol Mystery

Nancy has two mysteries to solve, and the answers lie in the beautiful and exotic country of Greece.

When money intended to help a needy village family disappears and the New York agency responsible for the money closes suddenly, Nancy is asked to fly to Greece to investigate. 

And when she is told that a large inheritance from a Greek tycoon, meant for her friend, Helen Nicholas, was stolen, she agrees to find the culprit.

Her two sidekicks, Bess and George join her on this dangerous mission.  

A poisonous snake in a basket of apples and a strange symbol stamped on a rare Byzantine mask are the clues.

They lead Nancy and her friends to a ring of art smugglers and to the secret of the Greek symbol.