That's a neat idea. I would probably need a lot of these because I own a lot of books. Great DIY idea for bookshelves.
tiny house decorating and storage inspiration - low white bookshelves under a window. great for the living room.
idea: these 'strings' on these shelves are actually metal, but this would be a cool configuration for a diy rope/dowel shelf. Bridge Shelves by Outofstock.
For the book lover: bookmark book stand for the night stand.
For Danielito DIY: toy car garage, toilet paper roll craft, boys toy room organization.