What are the bookshelves invented by heterogeneous combination method?

Light and shadow bookshelf, DIY minimalist bookshelf, etc.

The light and shadow bookshelf adopts the way of heterogeneous combination, combining the light and shadow elements with the bookshelf, and making the bookshelf present a unique visual effect by embedding a metal plate on the wall and extruding it into a horizontal board.

DIY minimalist bookshelf adopts heterogeneous combination mode, and uses simple diagonal squares to stuff books, which is convenient for users to freely combine and place them.