Harry Potter and the Chamber of Secrets, is the second novel in the Harry Potter series written by J. K. Rowling. The book was published on 2 July 1998; it subsequently won the notable Nestlé Smarties Book Prize in the age 9–11 category and was named the British Book Awards’ Children’s Book of the Year.  A movie based on the book was released on November 15, 2002.

Harry Potter and the Prisoner of Azkaban is the third novel in the Harry Potter series written by J. K. Rowling. The book was published on 8 July 1999. The novel won both the 1999 Costa Book Awards and the Bram Stoker Award, and was short-listed for other awards, placing it among the most-honoured works of fantasy in recent history. A film based on the book was released on 31 May 2004, in the United Kingdom and 4 June 2004 in the U.S. and many other countries.

Harry Potter and the Goblet of Fire is the fourth novel in the Harry Potter series written by J. K. Rowling, published on 8 July 2000.  The novel won a Hugo Award in 2000; it was the only Harry Potter novel to do so. The book was made into a film, which was released worldwide on 18 November 2005.

Harry Potter and the Order of the Phoenix is the fifth novel in the Harry Potter series written by J. K. Rowling. It is the longest book in the series, and was released on 21 June 2003. The book has been made into a film, which was released in 2007.

Harry Potter and the Half-Blood Prince, released on 16 July 2005, is the sixth of seven novels in J. K. Rowling's popular Harry Potter series.  The book sold nine million copies in the first 24 hours after its release, a record at the time which was eventually broken by its successor, Harry Potter and the Deathly Hallows.