For this part I just did a mix of Coptic stitch and other kinds into one that I find easy to do. (For info and tutorials about the actual stitching check this youtube channel, that should be all the styles and techniques you need )

First I joined the pages into 4 sheet signatures:

Then I used my punching cradle to make holes for the thread.

Here are the signatures with the holes ready:

The comes a couple pieces of fabric to hold the thread:

(For info and tutorials about the actual stitching check this youtube channel, that should be all the styles and techinques you need )

And finally, I put some hard begin and end to the text block (which I of course forgot at the beginning)

The i used a bit of standard common gauze medical for the upper part:

Text block ready!

To be continued!