So... the book is released under a Creative Commons license that does not authorize sharing derived works...

BUT...

If you use this tool I just vibe-coded with our good friend Claude: https://onetake-ai.github.io/html-ebooks/

And point it at the repository: https://github.com/yan7109/yan7109.github.io/tree/main/ma-bo...

It will give you an ePub with all the chapters, including a bit of styling etc.

The code is MIT licensed, so do with it as you wish.