The Prisoner in the Castle

This gripping mystery novel, set against the backdrop of World War II, follows former spy Maggie Hope as she is isolated in a remote Scottish prison known as Killoch Castle. As a series of baffling murders occur among the imprisoned agents, Maggie must rely on her skills and wits to survive and uncover the truth before it's too late. With electrifying action and nonstop surprises, this is a must-read for fans of the genre.