"Barrister bookcase," or "lawyer's bookcase" is the term for a stacking bookcase that housed legal books years ago. They are handy to own now because they protect books from dust, although I have found most of them to be somewhat shallow, therefore most modern size books are too large for them. They can be used as curio cabinets, though. Although I have a couple in my own home, I am showing you images I found on the web because mine are in rather dark corners and are hard to photograph.
All barrister bookcases have stacking sections that come apart easily for moving. There are variations that give them added value and interest. The example below has feet and a drawer at the bottom:
A beautiful golden oak barrister bookcase:
Manufacturers of barrister bookcases include Macey and Globe-Wernicke. The original paper labels will often be found in the back of the shelves. Here in Michigan, they sell for about $200 per section, unless they have unusual decorative elements.