Currently on Kickstarter with the GN priced at £25.plus an estimated £10 P&P. As it is currently on £1.4M raised it is crashing through the stretch goals. With such a talented team and coming from the publishing arm of the Terry Pratchett Estate, it couldn’t have a better pedigree.
edit: fixed link
Yeah, I’m not a superfan so would possibly pick up a mass market release and the fans can go all in on the goodies - with the stretch goals it should be a nice object and if you can then get it signed at a fan event…