Game to book copyright issues:
I'm not sure the issue has ever been litigated, but I'm just about
sure that
if you file off the serial numbers (get rid of really distinctive
terms like
"Armor Class" or "Prootwaddle" or "Hobbit"), then you could flog a
book.
There's another theory that might work too, that the book or
screenplay is a
"derivative work". BTW, I don't know how it came out in the end, but
30
years ago TSR got in trouble over the term HOBBIT, but they located
Halfling
in the original Nordic myths Tolkien drew from, so they switched all
references in the books to "Halflings". Of course years later after
D&D got
bigger and richer than the Tolkien estate, they may have just licensed
the
term back!
Finally, I suspect that in market terms, it would LOWER a book's value
if it
had references that were too clearly geared towards a particular game
system:
most potential readers wouldn't be players and would find the
references lame.
So, the typical publisher would ask for, and the typical author would
write,
"generic" fantasy novels... which is pretty much a description of the
publishing world right now anyhow.