In WWII-era London, lockpicker Ellie McDonnell gets caught breaking into a safe. Instead of being arrested, she's offered a deal to work for the handsome and enigmatic Major Ramsey to intercept 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. The hijinks continue in the sequel, when Major Ramsey asks for Ellie's help identifying a spy whose body's been found in the Thames. These fast-paced mysteries are truly a delight to read!