Mystery of the Queen's Jewels
by Gertrude Chandler Warner
The Boxcar Children are vacationing in London, England, where there is so much to see and do. Yet, as they eat their fish and chips, watch the changing of the guard at Buckingham Palace, and see the famous crown jewels of England, Violet can't shake the feeling that someone is following them. Have the Aldens flown across the ocean straight into a mystery?