books.google.com - GNU Emacs is the most popular and widespread of the Emacs family of editors. It is also the most powerful and flexible. Unlike all other text editors, GNU Emacs is a complete working environment--you can stay within Emacs all day without leaving. Learning GNU Emacs, 3rd Edition tells readers how to get...https://books.google.com/books/about/Learning_GNU_Emacs.html?id=eoI7dNY1d0YC&utm_source=gb-gplus-shareLearning GNU Emacs