Biggles Sees It Through (1951) By Captain W.E. Johns
 
Biggles Sees It Through by W. E. Johns was first published around August 1941 by Oxford University Press and since then there have been at least 8 other editions in the English language. The rather improbable setting (see research notes below) probably resulted in it not being picked up after the 1960s for the Armada or Knight paperbacks.
 
The events in the book take place during the closing days of the Finnish Winter War (30 November 1939 - 13 March 1940). This is after Biggles in the Baltic (Ginger becomes a Flying Officer here whereas in Baltic he was a Pilot Officer) and before the exploits in Biggles Defies the Swastika. Swastika was serialised almost 11 months earlier but clearly deals with events which take place later--the German invasion of Norway was only launched in April 1940, by which time the Finnish Winter War was over.
 
Hard Cover with Dust Jacket
254 pages
In Fair to Good Condition