I don't see where anyone has posted yet
the free University of Chicago ebook for the month of January, so I'll go ahead and do it.
The title is The Hunt for Nazi Spies: Fighting Espionage in Vichy France, by Simon Kitson (trans. Catherine Tihanyi). 208 pages.
“The story is at once confusing and fascinating. The Vichy regime tracked down left wing resistants and supporters of Charles de Gaulle’s Free French forces. It deported slave workers and Jews to Germany. Yet concurrently, it tracked down and arrested hundreds of German agents who sought to further undermine France militarily.… Kitson’s book is a highly-recommended read for anyone interested in the intricacies of counterintelligence.”—Joseph C. Goulden, Washington Times.
Looks like fascinating reading. Are you wondering how, say, Amazon or Goodreads rates it? Amazon gives it a 4 1/2 stars, but from only 3 ratings at the present moment. Goodreads gives it a 3 1/2, but from only 8 ratings at the present moment.
As usual for these free UofC titles, there are very few hoops to jump through to get the ebook. You just enter your email address and click "Get E-book." You will receive an e-mail confirmation with a link to download your free e-book. That's it--there's no requirement to get on any mailing list, get a note from your mother approving it, obtain a letter of credit from your bank, nothing. Easy peasy. Nice.
Oh, if you want the dead-tree (paper) version (cloth hardcover), you can buy it for only $25.00.