There's already an
Expanded Universe section in the General Star Wars board - we've often discussed books, comics and everything else there.
It's not exclusively about books, but there's a lot of topics about books (and more) there - it seems like that's a good place to discuss books without needing a new subforum.
Although, i'm not a member of staff, so they might feel differently - but I think it would be better to give an already extant board a boost, as opposed to making a new one.
AK.