As one of our Recommended Books: History, SPPIT.org has no hestitation in recommending The Collapse Of The Third Republic: An Inquiry Into The Fall Of France In 1940 by William L. Shirer.
This book was published in 1969 and we consider it still to be best book we have read on this topic. Unfortunately it is currently out of print but used copies are readily available. It is also available on a Kindle edition.
Available through Amazon.com and these Amazon affiliates:
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