Available for the first time, The Gideon of Scotland Yard Series by JJ Marric (pseudonym of Grand Master John Creasey).
A gang is at work robbing any passenger they find travelling alone on the top deck of London's buses. One night they strike too hard and murder results, followed by another killing of the bus conductress who could have indentified them. This is just one of several cases laden with human interest and suspense which came Gideon's way in another busy week at Scotland Yard.
John Creasey (1908-1973) published over 600 books under 20+ different pseudonyms. In 1969 he was given the Mystery Writers of America's highest Honour, the Grand Master award.