These bookshelves look so cool and magical. The bookshelf itself is invisible. The books look floating there. What you need to achieve this effect is the Invisible book shelf. The rest is simple. You mount the invisible floating bookshelf on you wall, and put books on it.
The shelf would be concealed by the books. It looks as if you don’t have any shelf there, and the books appear to be magically floating by the wall. Isn’t cool? Get the invisible book shelf in your room now. Alternatively, you can do I DIY by using some corner brace.