DD liked hearing our voices, more than she cared about the book. On maternity leave I would just read to her from whatever I was reading, a novel or a magazine or blog. DH would read stories as part of the bedtime routine, but wouldn't bother showing DD the book. Then around 2-3 months she started really looking at board books, and that was neat. At 3-4 months she was really into touch and feel books. Now almost 6 months and simply wants to eat them; she has no patience for reading them at all.
I will say that I was very skeptical about books for infants. I actually resented all the book gifts people gave us: more crap that I couldn't use for months or years, taking up space in our small house and making me write thank you notes

But by now we've read nearly every book we've been given, and have even bought some on our own. So I've changed my tune on books as baby gifts. Though I wish people wouldn't all give the same "classics" -- we have multiple copies of Good Night Moon and its ilk.