The Vorpal Blade  (English, Paperback, Forbes Colin)

A headless corpse has been discovered in the Thames just outside London, the body of a man who once worked for Tweed. Three thousand miles away, on the east coast of America, another headless body is found. Sensing instinctively that there must be a connection, Tweed, Paula Grey and Bob Newman follow the tortuous trail left by the killer, from London to America and into the heart of Switzerland. Paula, haunted by nightmares of the dreadful killings, takes the lead in their desperate search to put an end to the bloodshed and puts herself in extreme danger...