Reading

Already read all the books? Have you seen all the versions of the covers?
United States version of the books. Most people have seen and read all of these, they are larger than the British versions, and have pictures on the first page of each chapter.

British versions of the books. They have the British spellings and different covers, published by Bloomsbury, and do not have pictures for each chapter.

Adult versions of the books. I am not sure how different they are, but the covers are much darker, less about the characters, and more about the story lines.