I read a book recently called the Isbane Conspiracy, it was a great book and i made me open my eyes. Book and movies and even tv shows marketed toward young people are basically of the devil. Harry Potter give a child the idea that witchcraft is fun and not harmful. When in real life it is very real and not of God. Why would a believer think it is ok for anyone to read or watch something that outright goes against the teaching of His Word!!!
Read it though The Ishbane Conpiracy, it will change the way you look at things!!