just to be sure: you are ta�king about some kind of bookcase that rotates about two horizontal axes and the single shelves are attached to some kind of chain or whatever is running around? if so, keep on reading.
I used to work in a factory where these things were produced. unfortunately they sold the patents and everything a couple of years ago. and if you want them for books in your living room that wouldn't have helped you anyway. The stuff I am talking about weighs about a ton, is made of massive metal and generally used for heavy industrial equipment and tools. i'm not sure if they even exist for books. if so, probably as library or archive shelves. I doubt though that it exists in living room style. Anyway, I might be wrong, so don't give up!