This is great and very similar to the path I'm taking for my compiler project (https://bernsteinbear.com/blog -- compiling a lisp series). I'm even following the Ghuloum approach as well. Thank you for sharing!
This is such a neat project. Looking forward to the book. If there will be an English version, I'll buy a copy for sure :)
Maybe you could take inspiration from Bob Nystrom (of "Crafting Interpreters" etc) for typesetting :)