Hi, Stefan. Vernon Sipple work in this project only on Tuesdays, so he is not around to answer your questions, but I can provide a temporary answer. By the way, my name is Philip, or Philippos, in Greek. The person who is writing the book is Vernon Sipple.
First question: "How many Nim experts are there in your group?" That is easy: None. In fact, only Marcus Santos, who is a professor of computer science at Ryerson University, is conversant with computers. By the way, I have come to the same conclusion as you, and recommended that the book be removed from github. I still believe that this project is a mistake. Therefore, we are on the same page. Second question: "Why write in Latex?" That question is also easy to answer -- Vernon is not using LaTeX, he is writing in Markdown. Then, he uses pandoc to translate the Markdown files into LaTeX, epub, azw2, html and docx. In github, you will find the Markdown sources, and a Makefile to compile them to LaTeX. I think that it is easy to generate epub and html, instead of LaTeX. Finally, the book will be free, which excludes publication on paper.
