Sign of the Devil

THE FINAL FREY & McGRAY MYSTERY
All will be revealed...

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The Devil Has Come to Edinburgh...

An ill-fated grave-robbery unearths a corpse with a most disturbing symbol on it. When a patient in Edinburgh''s lunatic asylum is murdered, the same sign is daubed in blood on the walls - the mark of the devil.

The prime suspect: inmate Amy McGray, notorious for killing her parents years before. Her br...