This particular book is a children's book, written for older children and young teens. The protagonists of children's books and teen books are always children or teenagers, just as the protagonists in adult literature are adults. Jonas, the main character in this novel is only 11, although he is a few years older in the movie.
The Giver was first published over 20 years ago. It is about a dystopian society where the elitists who “know better” than everyone else strictly control the lives of the citizens. Everyone is told what they will do and how they are to think. They live their lives with little privacy or freedom. As for it being a book that advocates a PC mentality, I found it to do nothing of the kind. Frankly, it sounds like where we are headed with the Left becoming increasingly in control of freedom of thought in our country.
“The giver” seems very anti-PC to me. It’s a nice shot across the bough of the politically correct utopians.
“If everyone stopped being so PC,
Maybe we could live in harmony.” — Avenue Q