Hi everyone,
next week I'll participate in a conference/hackathon called WikiCite [1]
It will be a great opportunity to talk about Wikidata and books in general, and of course I'd love to work about the integration of Wikidata and Wikisource.
Of course, this is because the perennial issue of complicated relationships between books: a book as a "work", a book as an "edition" of that work.
To complicate further, Wikisources host the ns0 textual version of a book and
the nsIndex, but Wikidata do want only one sitelink...
Many discussions happened here [2],
but I fear I'm lost now. I don't know where are we now, and if some community did indeed solve the problem.