The Ministry of Unladylike Activity is the first book in a new children's mystery fiction series by British-American author Robin Stevens.

The book is set in 1940, at the start of World War II, and the British government is setting up a secret agency to train spies, called the Ministry of Unladylike Activity.

The protagonists are three new detectives from different backgrounds who find themselves caught up in two murders.

The book has won several accolades including: