The Price of Silence

This is Dolores Gordon-Smith's tribute to John Buchan and the Thirty Nine Steps, now celebrating its centenary. All references and similarities are intentional.
Working for the British Government as a secret agent, Anthony Brooke wants to expose the people responsible for blackmailing innocent people and gruesome murders. But when the gang plots a kidnap, Anthony finds himself in the race to reach the little girl before they do. However, Milly will not be easy to retrieve, for she is in a Belgian convent, in German-occupied territory.
To rescue her, Anthony must go behind enemy lines, crawl under the wire, face ruthless German guards and break into a convent. But, even if he can save her, what possible use could an orphan girl be to a violent gang? Anthony must find out soon, as countless more lives than just the little girl's are in danger...