It is very risky. But each time a child opens a book, he pushes open the gate that separates him from Elsewhere.
As a shy, introverted, scholarly child (long ago) I don't know what I would have done without libraries! My family moved often. I was always the new kid in town. The library always offered me my first and most important friendship: the place where I felt right at home. I still feel that way today, about libraries.
I make up the characters in my books, but of course my consciousness is filled with every child I've ever known, including my two grandchildren, my own kids (I had four) and especially myself as a child, because that person still lives inside me, too.
I was a sidelines child: never class president, never team captain, never the one with the most valentines in my box.
I'm not terribly conversant with children's literature in general. I tend to read books for adults, being an adult.
I don't read young adult or children's books, now that my grandchildren are beyond the age of my reading to them. I read reviews, and so I'm aware of what's out there. But I tend not to read the books.
I tend not to think about audience when I'm writing. Many people who read "The Giver" now have their own kids who are reading it. Even from the beginning, the book attracted an audience beyond a child audience.