I hadn’t printed a copy of my book for myself for about 4 years, and since I’ve added a lot since then, I wanted a new version to mark up.   This new version (V0.3.5) is now up to 313 pages, whereas my May 2019 V0.1.15-6 version weighed in at a much skinnier 258 pages.

This time, so I could see what it looked like, I got myself a hardcover copy:

The hard cover has a nice feel and thickness, and the book has a nice weight.  It also opens fairly flat, which is nice for a textbook style book.  All in all, I’m pretty impressed with the binding.  My only complaint is a small curvature to the covers.