H C Herman Cyril Mcneile: 3 books

After the war McNeile left the army and continued writing, although he changed from war stories to thrillers. In 1920 he published Bulldog Drummond, whose eponymous hero became his best-known creation. The character was based on McNeile himself, on his friend Gerard Fairlie and on English gentlemen...

Challenge was the tenth and final Bulldog Drummond novel.  When Colonel Henry Talbot summons Bulldog Drummond and Ronald Standish, it is to inform them of the mysterious death of one of their colleagues, a millionaire. There was no sign of any wound, no trace of any weapon when they found...