I much prefer "An Introduction to Programming in Emacs Lisp", which is available both from inside emacs in M-x info, and on the web at https://www.gnu.org/softw

I much prefer "An Introduction to Programming in Emacs Lisp", which is available both from inside emacs in M-x info, and on the web at https://www.gnu.org/software/emacs/manual/eintr.html https://www.gnu.org/software/emacs/manual/eintr.html