I haven't commented on the eternal debate over Harry Potter. I have read all the books and agree with the parents' decision for any child. Kind and attentive parents can allow the child to read the book and explain that it is fiction. Other kind and attentive parents may ban the reading of the book as a means of preventing all possible negative influences which it contains.
However, I have never seen an article which discusses the meaning of the Biblical word "sorcery" as well as this article does. It is simply the most concise explanation of the Biblical condemnation of contraception (Greek: pharmakeia, often translated as "sorcery") that I know to be in existence. It covers the Catholic Church, the Church Fathers, Protestant Reformers, and secular historians in a few paragraphs, tying them together with Harry Potter (Spoiler alert!).
Please read it.