Book

A repository of Markdown files, and a book.json config file, can be viewed as a book.
readonly.link/books/{host}/{username}/{project}
Example URLs:
Example book.json:
{
  "title": "The Little Typer Exercises",
  "subtitle": "A student's report on \"The Little Typer\"",
  "version": "0.0.2",
  "authors": ["Xie Yuheng"],
  "date": "2021",
  "src": "src"
}