Since I am at looking for stamps on non-philatelic books... I just see a stamp-look-alike cover in a bookshop. On a book entitled Tous Français. Immigration, la chance de la France (Everyone's French. Immigration, France's luck), the Marianne des Français is printed, the one from the definitive series, without the leaves and the birds.
Amazon.fr website for the cover and WNS website for the stamp.
On the back of the book, is written "All rights reserved" : who concluded the agreement ? Designer Thierry Lamouche or Phil@poste ?