Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:5707313.

Inspired by a design on cults that was too expensive for me so I made my own version and am giving it out for free.

prints all in one can barely fit on an ender 3

use a rubber band as the spine of the book and put scrap filament in the holes as hinges

uses 1/4 of a printer paper per page so cut a piece of paper in half then fold the remains in half and slip it in the book