Dink, Josh, and Ruth Rose are thousands of miles from home and absolutely ready to explore the exciting, historic streets of London. They are having the best time riding the massive London Eye and visiting famous, ancient landmarks until shocking news suddenly hits the city. Someone has managed to steal Queen Elizabeth's priceless royal jewels right outside the heavily guarded Windsor Castle. The local police detectives are completely stumped, which means it is the perfect time for three clever kids from Green Lawn to step up and take charge. Pack your bags and join the young detectives as they rush to the royal castle to search for overlooked clues in the courtyards. You will get to piece together the scattered evidence and track down a brilliant royal thief in a foreign country. Keep your eyes wide open for hidden messages as you help solve this massive international puzzle.