London, Hodder & Stoughton, 1945. First edition. After 'Sapper' (H.C. MacNeile) passed away, author Fairlie took over the series. Here, Bulldog, Algy, and Peter are working for British intelligence sounding out the French resistance as well as battling Irma Peterson at the tail end of WWII. Boards bowed, spine faded. Binding loose at title page, showing webbing. $15.00.