Title: The case of the counterfeit criminals
Description: When a dinosaur fossil hunter is blackmailed by kidnappers who need her to fake a validation in return of her beloved pooch, Ada and Mary are given three days to find the offenders and save the scientist's reputation.
Subjects: Fiction, Juvenile fiction, History, Childhood and youth, Mystery and detective stories
Places: Great Britain, London (England)
People: Ada King Lovelace Countess of (1815-1852), Mary Wollstonecraft Shelley (1797-1851)
Time periods: 1800-1837, 19th century