I suppose this would depend a great deal on the subject matter, or source, involved. If she predominantly enjoys reading romance novels, or style magazines, I'd be mildly disturbed. However, if her tastes ran to more enlightening material I'd be very pleased.
this is an interesting question, as I work in a library... I got the job because they were hiring, I'm not much of a reader. but just because I don't read much, doesn't mean she shouldnt not read much either. girls who read, show theyre smarter than they look or lead on, and that's a good thing. so if a girl told me she likes to read, then id def. consider her, dateable, at least to me, not sure about other guys