The Secret of the Soldier's Gold

GOLD RUSH! The police in Portugal have asked Fenton Hardy to come help them solve a crime, and Frank and Joe are tagging along. Before they even get on the plane, they’re given a mission of their own: Mrs. Rilke, a friend of the grandmother of one of Frank and Joe’s classmates, is sending the boys on a treasure hunt! After World War II, a defecting German soldier buried a fortune in gold bars in Mrs. Rilke’s childhood backyard. She asks the Hardys to recover the treasure so she can donate it to