Who said that a staircase can only serve to move around the floors of a house? Not at all. If you have a two-story summer cottage, but there is still absolutely not enough space, you need to come up with solutions to this problem yourself.
Czech designer Maya Kvetny did the following: she transformed stair steps into bookshelves. Firstly, it saves space perfectly, no cabinets or special shelves are needed; secondly, it is quite convenient. You can put a certain category of books on each step. For example, sort them alphabetically, by author or epoch, here is what you prefer.
And it looks interesting, besides.