Made a living hinge cover for a small notebook with some tweaking after using https://www.festi.info/boxes.py/
Designed a simple closure based on the catalog desktop tool carousel (of which I’ve made several). The engravings are downloaded and the corners are modified from OpenClipart, by GDJ. I bought a set of these small notebooks on Amazon and took the covers off: http://a.co/d/0GaU0ro.
I did my covers on medium maple ply and glued just the back of the notebook in. The closure just pops in by squeezing it in and you can glue the bottom or leave it loose. Dampening the hinge eases closing the cover for the first time and I let it sit and dry like that for a while. I used the free font HermosaOpti to personalize the front.
The file: booklet.svg.zip (158.6 KB) created in Inkscape. Enjoy!