Prepare for Action

A World War II thriller by a multimillion-selling, Edgar Award–winning author.

As plans for D-Day loom large, the agents of Department Z—a secret detective unit within British intelligence—are working overtime to halt the leaking of intelligence to Berlin. Meanwhile, three cousins undertake their own covert operation: meeting in a cottage in Guildford to discuss a dark family matter in secret.

As these two seemingly unrelated events collide, the cousins are drawn along a secretive trail that ...