I am not there yet, but have a lot of kids in family that I have seen growing up. There are a lot of things I feel could be done better. I have learnt a lot that way, but I do feel that books help. I read books once in a while about parenting and kids. It helps me with my nephew and niece and there is always great stuff to learn !
I've read more about pregnancy and birth. For my first pregnancy I read so much and most of it was (in my opinion!) complete crap and totally at odds with my instincts. So for bub number 2 I decided that I would follow my instincts more than books or advice. Given that I am studying to be a doula I do read a LOT of books on pregnancy, birth and parenting!