Title: The Secret of the Soldier's Gold
Description: While on a trip to Portugal with their father, the boys go on their own hunt for gold bars, a treasure that was buried in Mrs. Rilke's childhood backyard after World War II by a defecting German soldier. Someone else has found out about the treasure and is searching for it also. Can Frank and Joe find it before it falls into the wrong hands?
Subjects: Detective and mystery stories, Buried treasure, Fiction, Children's fiction, Adventure and adventurers, fiction, Gold, fiction, Soldiers, fiction, series:HardyBoys, collectionID:HBMS4