I've also decided to only change the main tunebook once a year, so there is now an 'Annex Tunebook' as a suplement (and a 'Possible Tunebook').
As always, corrections gratefully received - particularly any comments on the chords, which are often based on what abcmus thinks (which isn't always sane) - I try and make them work, but I'm not a chord-instrument guru.
Thanks for all your hard work Paul. I've long since downloaded your book and the abc files. Truly a nice labor of love. Given your comments about chords I'll take a look through things to see if I notice anything. And, I'd highly recommend you leave the Tunebook in some format and then and a second one (or a supplement or whatever you choose to call it). Otherwise those of us who've gotten onve version or another will never be sure what we have and so various versions will start to exist adding confusion for everyone (except you of course!)