Here are links to our research sources and other recommended sites related to French Chateaux:
Wikipedia is a fantastic treasure-trove of information on chateaux, however the reader must be careful as it is sprawling and the various lists, composed as they are by different contributors, are often incomplete - sometimes even conflicting in their information.
We are compiling our chateau lists from these lists, together with sources such as Google books, individual societies, the ISMH database and more.
http://books.google.com/books?id=ALXhtLaCdTMC&pg=PA851 - Mentions very large number of Chateaux in Alsace - p.7, index. In French.
http://www.sifex.co.uk/chateauxSearch.asp - Estate agent - French chateau specialist - listing many glorious French Chateau properties currently on the market.
http://www.chateauxforts-alsace.org/visite_index.php?type=0 - Association Chateaux Forts et Villes Fortifiees d'Alsace - much fine information!
http://www.chateau-fort-manoir-chateau.eu very well organized listings, huge number of chateaux
Old Books on Chateaux
These appear to be in the public domain and are visible in full at Google Books:
"Castles and chateaux of old Burgundy and the border provinces" (1909) - Francis Miltoun, Milburg Francisco Mansfield - http://books.google.com/books?id=GvxdAAAAIAAJ
"Castles and chateaux of old Navarre and the Basque Provinces (1907) - Francis Miltoun - http://books.google.com/books?id=o6NCAAAAYAAJ
"Castles and chateaux of old Touraine and the Loire country (1906) - Francis Miltoun - http://books.google.com/books?id=5YoMAQAAMAAJ
"Farm houses, manor houses, minor chateaux and small churches: from the eleventh to the sixteenth centuries, in Normandy, Brittany and other parts of France" (1917) - Ralph Adams Cram - http://books.google.com/books?id=7RMtAAAAYAAJ
"French cathedrals and chateaux, Volume 1" (1903) Clara Crawford Perkins - http://books.google.com/books?id=9F1TAAAAMAAJ
"Historic chateaux: Blois, Fontainebleau, Vincennes" - Baron Alexander Dundas Ross Wishart Cochrane-Baillie Lamington - http://books.google.com/books?id=9lxKAAAAYAAJ
"Old Touraine the Life and History of the Chateaux of the Loire" (1906) - Theodore Andrea Cook - http://books.google.com/books?id=Vph73jlvCP4C
"Rambles around French châteaux" (1911) - Frances M. Parkinson Gostling - http://books.google.com/books?id=Hhc9AAAAYAAJ
"Romance of the Bourbon châteaux" (1905) - Elizabeth Williams Champney - http://books.google.com/books?id=U18BAAAAYAAJ
- also by the same author "Romance of the Feudal châteaux" - http://books.google.com/books?id=56MwAQAAMAAJ and "Romance of the Renaissance châteaux" - http://books.google.com/books?id=KshAAAAAYAAJ
"The châteaux of Touraine" (1906) - Maria Hornor Lansdale - http://books.google.com/books?id=EqJLAAAAMAAJ
More - cut / paste this search: http://www.google.com/search?tbo=p&tbm=bks&q=intitle:chateau&tbs=,bkv:f,cdr:1,cd_max:Dec+31_2+1900&num=10
Alex Newman - FrenchChateau.net