My LO indirectly hears A LOT of children's stories. I have two 19 month olds who love books. When I was pregnant with them, I didn't read books aloud or sing, etc., but I do feel as if this LO is benefiting from all the reading and singing. If nothing else, I feel like my emotional connection with him/her is growing. On the other hand, I felt more awkward than connected when I even tried to talk to the babies during my first pregnancy, so I am not sure any of us would have benefited.
I say that, at the very least, using books and music to build an emotional connection may be worthwhile to you, baby, and DH.