When Mary Godwin and Lady Ada Byron first meet, they don't exactly hit it off. But with crime on the rise, the unlikely pair form a detective agency to hunt down clever criminals on the streets of London. Their first case involves a stolen necklace, a false confession, and lots of suspicious suspects - but these are no match for Ada and Mary. Filled with daring balloon chases, vile villains and two unforgettable heroines, The Case of the Missing Moonstone is the first in a thrilling new series; perfect for all aspiring sleuths.

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.