Margaret of Anjou, Queen of England by Philippe Erlanger. (Published 1970)
(I gave this book two stars on Goodreads.)
This is not the best book written about Margaret of Anjou (check out Helen Maurer's work) but it is useful. The author is French (as I would have guessed even if his name had been Fred Bloggs) and it is his knowledge of the French aspects of Margaret's life that make this book of interest as these very aspects tend to be neglected by English/Anglophone authors and are yet (obviously) important.
On the other hand, when reading about English events in this work please check carefully against other sources. I found factual errors, most notably the presence of Margaret at the Battle of Wakefield, where she very definitely wasn't. There's odd things like Hastings being described as a kinsman of Earl Rivers. (He probably was, in some degree, but I doubt he boasted about it and it certainly wasn't his main selling point.) There were also bits of chronology that made me go - eh? If you really know your wars of the roses you will know what bits to disregard, but if you are still learning do not rely on anything in here as far as English history is concerned.
The author also has the common and infuriating habit of quoting great chunks of Shakespeare which have no place in a work of history. I knocked off a star for that alone as it is something that really cheeses me off.