Leslie Charteris combined action packed style with a lot of fun and humor. The Saint is one of the all time great characters in spy-detective fiction, and this has him in WWII timeframe, working on the side of good, as always, though not always on the side of the law. There's a very good reason why it is hard to find Saint books posted on here!
A nice WW2 mystery. Who is trying to obtain the industrial secrets - the Nazis or greedy tycoons?
I enjoyed the book but it was very verbose.