The Secret of the Key: A Sixty-eight Rooms Adventure (The Sixty-Eight Rooms Adventures)

In the conclusion to the Sixty-Eight Rooms Adventures, sixth-graders Ruthie and Jack discover two out-of-place magical rings in the Art Institute of Chicago's Thorne Rooms as well as an open portal leading them to 17th-century England, where they meet a secretive governess while tracking down clues in multiple time periods and world regions to where the rings originated and why the portal was open in the first place. Simultaneous eBook.