Update: the cat cover is my second project for this class. It is a long sketchbook with a heavy weight paper.
This was my first time trying a simple Japanese stitch. I did not put a tremendous amount of effort into making this notebook because I just recently started to learn how to book bind. So this was more of a trial to see if I would like to make more (and better ones) in the future.
For the covers I used a very cheap and flimsy piece of (warped) chipboard. For the decorative paper, I went with a thinner paper (although in the video the teacher says to use card stock). By accident, I taped the paper onto the chipboard upside down. But like I said, this was just a trial so it was okay :-)
I am currently working on making a notebook for my sister's birthday and I'll be using the tortoise stitch as shown here in the videos. To make the front and back covers look nicer, this time I'll be wrapping the paper around the covers as I've seen bookbinders do in other tutorials. I think wrapping it and also covering the insides with a pretty paper will look much nicer and more put together. I'll upload a picture of that too when it's finished!