Spotting a ghostly girl in the park who resembles the Wollstonecraft Detective Agency's new client, Lady Ada and Mary discover links between the girl and a case involving a hospital, a missing will, a hasty engagement, and a devious servant.
- ISBN10 0385754442
- ISBN13 9780385754446
- Publish Date 26 January 2016 (first published 5 January 2016)
- Publish Status Out of Stock
- Imprint Alfred A. Knopf Books for Young Readers
- Format Hardcover
- Pages 224
- Language English