The GNU Emacs Lisp Reference Manual, Seventeenth Edition, for version 24.5 of the GNU Emacs editor. This is the original manual in US Letter format as downloaded from the GNU Emacs website (https://www.gnu.org/software/emacs/manual/elisp.html) and split into two parts, each containing the table of contents and the index. This is the first volume, containing chapters 1 to 25. The cover image is the Emacs logo by Luis Fernandes (http://www.ee.ryerson.ca/~elf/emacs/logo/index.html). This print-on-demand book is presented as a service to Emacs users and no profit is made from it. See https://johnp.net/jpkb/wiki/EmacsManuals for more information.