We had our first books question today: https://chemistry.stackexchange.com/questions/404/books-on-chemistry
Now that one in particular is slightly too broad and gets a CV(yes, I chose the wrong category) from me (anyone agrees?), but I'm talking about books questions in general. They don't have definite answers and really should be CW--but CW for list-type questions is discouraged nowadays.
I personally am OK with specific book recommendation questions--eg "what books are good for
<level>?". These generate a few answers, but not a whole bunch--and need not be CW.
Additionally, if we do allow book questions, should we do something similar to this? (I say we do that only once we have enough book questions)