Since the release of the first novel Harry Potter and the Philosopher's Stone on 30 June 1997, the books have gained immense popularity, critical acclaim and commercial success worldwide. The series has also had some share of criticism, including concern for the increasingly dark tone., the book series has sold about 450 million copies, making it the best-selling books series in history and has been translated into 67 languages, According to Rowling, the main theme is death, although it is primarily considered to be a work of children's literature. There are also many other themes in the series, such as prejudice and corruption.
Plot
The novels revolve around Harry Potter, an orphan who discovers at the age of eleven that he is a wizard, living within the ordinary world of non-magical, or Muggle, people. His ability is inborn and such children are invited to attend a school that teaches the necessary skills to succeed in the wizarding world.
Each book chronicles one year in Harry's life with the main narrative being set in the years 1991–98. The books also contain many flashbacks, which are frequently experienced by Harry viewing the memories of other characters in a device called a Pensieve.
The environment J. K. Rowling created is completely separate from reality yet intimately connected to it. While the fantasy land of Narnia is an alternative universe and the Lord of the Rings' Middle-earth a mythic past, the wizarding world of Harry