Does any one have a good source or a suggestion for a book (or other format) that has collections of floor plans for castles? I'd love to have a book that does more than just recount the history of said buildings, but has pictures, maps, drawings, and diagrams that show what the castles look like on the inside.

Historical information would also be good, but I really want something akin to a book of maps or layouts that show the interior rooms, corridors, and the like.