Mary-Kate and Ashley are at Sea World with the parents, who are hard at work creating a computer program that will let humans speak with dolphins. The twins can't seem to find a mystery--until they stumble upon a mysterious body and a Lady in Black who leads them on a wild goose chase!
- ISBN10 0590863703
- ISBN13 9780590863704
- Publish Date 1 April 1996
- Publish Status Active
- Publish Country US
- Imprint Scholastic US
- Format Paperback
- Pages 80
- Language English