Cryptex Lock Notebook

Full instructable detailing assembly with an in depth guide on different bookbinding techniques:

https://www.instructables.com/id/Cryptex-Lock-Notebook/

To collect another nerdy hobby, I recently started doing some bookbinding. After tossing together a couple stab bound sketchbooks, I sought something a little more user-friendly (ie. a binding style that would open up laying flat). Fortunately, a few folks had already posted instructables on Coptic stitch bookbinding which seemed to meet my requirements:

https://www.instructables.com/id/DIY-Coptic-Stitch-Bound-Notebook/

https://www.instructables.com/id/2-LEGO-Journals/

Of course, being lazy, I wanted to improve matters find a way to create one cover that I could constantly reload with paper to avoid spending time and material on new covers every time I ran out of pages. Additionally, since my scribblings tend to be a bit subversive and my doodlings occasionally NSFW, I wanted a way to secure my notebook. Here is the re