
The first edition of “Parsing Techniques – A Practical Guide”, written by Dick Grune and Ceriel Jacobs is available for free as a pdf download.

The first edition of “Parsing Techniques – A Practical Guide”, written by Dick Grune and Ceriel Jacobs is available for free as a pdf download.

Download “TeX for the Impatient”, written by Paul Abrahams, Kathryn Hargreaves, and Karl Berry, in pdf format.

“The Craft of Text Editing: Emacs for the Modern World” by Craig A. Finseth. You can download this free ebook in multiple formats. This book covers all aspects of creating a character-based text editor.