I'm designing a pair of built-in bookcases for my daughter's home, which will be installed on top of 32" base cabinets and reach to a 9' plastered ceiling. Should be simple - right? Nothing is square straight or level in this pre-1900's home. Also, bookcase cannot be secured to the wall, which is soft brick, so anchors can pull out. I want to allow for 1/4" - 1/2" of change in height, because of potential shifting in the structure. I remember catching a glimpse of a Saturday morning TV show several months ago that presented a possible solution by securing the top to a 2x6 or something that had been screwed to the ceiling joists and was hidden behind a panel at the top of the bookcase. It was finished off by wrapping the top with crown moulding. I don't remember enough of the details. No idea which show. I'd love to locate this episode or otherwise get some solid design advice.