The third Richard Hannay adventure.
This time Hannay and his usual friends are battling a German super spy who could destroy the allies chances of winning the Great War.
Unlike the first two featuring Hannay , this is much more political than "The 39 Steps" and "Greenmantle".
The author is not fond of trade unions and Communism and all that goes with them. This does lead to a couple of rather slow patches in the book where Buchan wanders off with a bit of philosophizing but all in all a good adventure and the best of the three. (1919)
