This bookshelf which opens up to reveal a hidden room

Bookshelves that open up or revolve to reveal hidden staircases or rooms and parlors. We must have seen this several times in various movies of crime and intrigue. Even Victorian or medieval movies will show a revolving interior book shelf. Being a millionaire you would definitely want something identical to what is shown in this picture, a complete series of pristine white bookshelves filled with various books. The shelves are partitioned into various compartments so that one of them can be rotated. You could always integrate such a construction to hide a private room meant for a select few or even to keep some of your most valuable possessions.