Copyrightability isn't really what's at issue here, as this is all written text, which is clearly a form of copyrightable expression.
There is the issue, though, of a copyright on a compilation of public domain works, or on the edits on top of a public domain work that create a derivative work. These copyrights don't subsist in the PD works themselves, though.
There is the issue, though, of a copyright on a compilation of public domain works, or on the edits on top of a public domain work that create a derivative work. These copyrights don't subsist in the PD works themselves, though.