This is a ground-up rewrite of the entire songbook, open-sourced under a Creative Commons licence.
The songbook is written in LaTeX.
If all you want is to download the latest PDF, you will probably find it here.
The main file for the songbook is the master.tex file and songs are included from within the songs directory. If you wish to contribute, please read the Help Manual first, either via the help.tex file or download the PDF from here.
Missing chords should be added to the master.tex file, songs included there too.
The currently available songbook is based on an A4 layout.