Favorite book for baby?

I am in the process of buying my son’s Christmas gifts and would like to get him a book or two. He is about to turn 4 months. I see that “favorite books for children” has already been asked. However, books for him would need to be for a baby, specifically, up to one year old. I already have many. My favorite of his is “Corduroy” (it was my favorite as a child).
Does anyone have any suggestions? Thank you!