I don't have a copy of this book, but...

The Sixth Column - Peter  Fleming

... the next time I have a spare couple of hours in Edinburgh, I'll try and find this one at the National Library. 

 

With a subtitle of "where spies spy on spies who spy on spies" this should be as hilariously bad as one of Fleming's brother's novels.

 

And how could I possibly resist having a chuckle at a TSTL spy adventure?