It's interesting that you say your daughter was drawn to books very early on. DS2 loved books and learned to crawl just to get to his books.
What really freaks me out is I also have baby DS (7 weeks!) and while I remember DS2 being alert and looking at books our baby DS has what we call book lust. If I take the book away he cries! We have already had several book reading sessions last over 30 minutes. My thoughts are: Oh no! Another one!
My two kids are already as different as night and day but I do hope they both love books.
