I don't know how to convey that the thing linked is a book, or that it concerns programming in general with Emacs Lisp as the language, or that it is aimed at n

I don't know how to convey that the thing linked is a book, or that it concerns programming in general with Emacs Lisp as the language, or that it is aimed at non-programmers, without changing the title. That's really easy, you put it in a comment and use the original title. You can't use titles for commentary on HN, it's in the site guidelines under 'In Submissions' https://news.ycombinator.com/newsguidelines.html https://news.ycombinator.com/newsguidelines.html