Early in the beta, community member Beastly Gerbil started a meta conversation titled Should we be tagging questions with the names of specific books?. So far, we generally have been tagging questions with book titles, but that has caused several problems, and has the potential to cause problems down the line, including (these are all borrowed from Standback's meta answer on the subject):
What happens if two books have a similar title. For example, take a look at how many books have the title "Love".
Stack Exchange has a feature that lets you favorite tags, which makes it easier to find questions tagged with your favorite tags. Tagging by book title ruins that feature, because there are so many tags that it's inefficient to add all of your favorite books.
So what should we do about title tags? Keep all of them, keep some of them, or keep none of them? I want to have this conversation now, because (a) we now have practical experience with title tags so we know if they're useful, and (b) it is still feasible to remove them as this site only has about eight-hundred questions.