The Shackleton Sabotage (The Boxcar Children Great Adventure #4)

In this all-new very special miniseries, the Aldens have been recruited by a secret society to return lost artifacts and treasures to their rightful locations—all around the world! The Aldens chart a course for Sydney, Australia, and as the children tour the famed Sydney Opera House, their next puzzle—and its key—falls right into their laps. They need to find the rightful owner of a rare Australian coin. Using their knowledge about Australia, the Aldens find the coin's owner, but a saboteur...