Usually, we tilt the last book on the shelf to keep it from falling.   It’s an unconscious action, and many bookends on the market today are created for that purpose. Bookshelf, brought to you by A’postrophe Design, has it’s own radian, which means that the books stay to one side of the shelf without you having to consciously tilt them.  The natural shape of the shelf itself makes the notion unnecessary.
The creative structure may look flimsy because it’s made of lightweight materials, but it can support the weight of many books.  The strength of the arched boards makes it easier to assemble-no screws, punching, or broken thumbs necessary. It represents the philosophy of getting better results with fewer materials.  The foldable design is easy to move and assemble.