I hope that it is appropriate to post this request here.
There is a particular French / Flemish Belgian reference book that I have been looking to buy a copy of for the last year or so. If anyone has an unwanted or unneeded copy I would certainly appreciate them letting me know.
The French title is -- Catalogue Officiel des Timbres Preobliterie de Belgique 1894 - 1996 It is basically a guide to all Belgian precanceled stamps during those years. I understand it has been out of print for over 10 years I've attached a picture of a book below
Have a look at this older post on our Belgian Precancels thread - I compare the listings in that Belgian preos catalogue with those found in the Precancel Stamp Society's International Precancel Catalog. By and large, the PSS catalogue contains all the same listings as the Belgian catalogue, although they're ordered differently (and the Belgian catalogue is a much more professional-looking work with lots of images, whereas the PSS catalogue looks more like a home-produced affair). Be careful if buying that PSS catalogue - there is an older PSS catalogue for foreign precancels which only consisted of France, Algeria, Tunisia & Monaco, and that one will be more commonly seen if you're buying used catalogues.