The third amazing adventure for the Invisible Detective.
A ghostly presence . . .
London, today: Investigating a strange death and a haunted house, Art and his friends learn there are monsters on the streets of London, dressed as soldiers and trained to kill. Can even the Invisible Detective stop the Ghost Soldiers?
And why is Arthur Drake, a boy from the London of today, reliving this horror from the past - almost as if he'd been there . . .?
London, 1936: The Invisible Detective can solve any mystery, great or small - but no one's ever seen his face. Truth is, the detective is the creation of four extraordinary kids who combat crime in his name . . .
