Mary-Kate and Ashley take on the Big Apple and solve a mystery at the world-famous New York City Ballet. Spot art throughout with two full-color collectors snapshots bound in.

When there's a rash of missing basset hounds, the Olsen twins--along with their own crime-solving basset, Clue--help track down the missing pups. Original.

The twins find another mystery on their hands when they visit the New York City Ballet and learn that the star ballerina's diamond tiara has been stolen.

Ashley and Mary-Kate are having a terrific time on a family vacation in Washington, D.C. They especially like spending time at the Smithsonian Air and Space Museum. But during their visit, the famous Wright Brothers' plane starts to tremble -- and spooky voices float down from the cockpit! Could there be a ghost in the machine? Mary-Kate and Ashley are on the case!

The twins are called in to help solve a mystery with their Grandma.