A hooded serial killer finds a novel way to murder his victims–he lashes them to death with a whip. The police try to track him down before any more murders…

A strangler is loose on a British estate, and he not only strangles his victims but brands an “M” onto their foreheads before he decapitates them.

Both Scotland Yard and an amateur American sleuth are tracking a master criminal known as The Frog. This moniker refers to the bulging-eyed mask worn by the evildoer, and is…