This is a leather bound sketchbook I made maybe 10 years ago.
I sewed all the signatures together and glued it into the leather cover.
Some of the pages were poor quality white sketch paper torn from a pad, some were tissue paper and some brown paper with fold out pages
I remembered making it and pulled it out to try to fill but the paper is ALL of such poor quality I'd rather not bother. So this is a lesson in buying and using the best quality art supplies you can afford.