Collins, London, 1973, Crime Club.  ISBN 0-00-244960-9.  Hard cover, 254 pages.  Very good; red boards with black lettering and logo on spine; bit of edge and corner wear, slight flare to front board; binding sound.  Dust jacket with price intact has edge and cover wear, short edge tears, scar on upper front panel, some rubs, wear at corners and spine ends.  Book interior clean and unmarked with tanned pages; scrape on upper page block.  Philip MacDonald writing as Martin Porlock.  ‘For the perpetrator of a series of appalling murders in the greatest city of the world to defy capture and remain at large, killing, is a blow at the very structure of society; how much more is this so when the victims of his knife are the guardians of the Law themselves?  A policeman is killed in amazing circumstances, in a country town near London – and the hunt is up!  Another and still another murder is committed until the apparently never-ending series of diabolical crimes engages the serious attention of the whole Cabinet.’ (from front flap)