A setting in World War II London, a shadowy government spy agency, a curious lockpicker with a mysterious background, an entertaining love triangle… need I go on? Ellie McDonnell, our heroine and aforementioned lockpicker, gets caught breaking into a safe with her locksmith uncle. Instead of being arrested, she's offered a deal to work for the handsome and enigmatic Major Ramsey in exchange for intercepting a treasonous message that's on its way to the Germans. But nothing goes to plan, and Ellie and Major Ramsey, along with a motley crew of small-time criminals, undergo a series of dangerous operations. And the hijinks continue in the sequel, when Major Ramsey asks for Ellie's help identifying a spy whose body's been been found in the Thames. These fast-paced mysteries are truly a delight to read!