Are you implying there’s a chicken-and-egg problem with books? How are you supposed to learn how to read without written material?

No. I am not implying a chicken and egg problem. If you generally start to learn how to read with 6 what would do get from a book between the age 0-5 when you cannot read? In another thread someone explained that usually parents "read" the book to the child - child answered my question. My parents never read books to me so I did not know this was common.