Harry Potter and the Chamber of Secrets

Harry Potter and the Chamber of Secrets is a fantasy novel written by British author J. K. Rowling. It is the second novel in the Harry Potter series. The plot follows Harry's second year at Hogwarts School of Witchcraft and Wizardry, during which a series of messages on the walls of the school's corridors warn that the "Chamber of Secrets" has been opened and that the "heir of Slytherin" would kill all pupils who do not come from all-magical families. These threats are found after attacks that leave residents of the school petrified. Throughout the year, Harry and his friends Ron and Hermione investigate the attacks.

The book was published in the United Kingdom on 2 July 1998 by Bloomsbury and later in the United States on 2 June 1999 by Scholastic Inc. Although Rowling says she found it difficult to finish the book, it won high praise and awards from critics, young readers, and the book industry, although some critics thought the story was perhaps too frightening for younger children. Much like with other novels in the series, Harry Potter and the Chamber of Secrets triggered religious debates; some religious authorities have condemned its use of magical themes, whereas others have praised its emphasis on self-sacrifice and the way one's character is the result of one's choices.

Several commentators have noted that personal identity is a strong theme in the book and that it addresses issues of racism through the treatment of non-human, non-magical, and non-living people. Some commentators regard the story's diary that writes back as a warning against uncritical acceptance of information from sources whose motives and reliability cannot be checked. Institutional authority is portrayed as self-serving and incompetent.

The film adaptation of the novel, released in 2002, became (at the time) the fifth highest-grossing film ever and received generally favourable reviews. Video games loosely based on Harry Potter and the Chamber of Secrets were also released for several platforms, and most obtained favourable reviews.

While spending the summer with the Dursleys, the twelve-year-old Harry Potter is visited by Dobby, a house-elf. Dobby says Harry is in danger and must promise not to return to Hogwarts. When Harry refuses, Dobby uses magic to destroy a pudding made by Aunt Petunia. Believing that Harry created the mess, Uncle Vernon locks him in his room. The Ministry of Magic sends a notice accusing Harry of performing underage magic and threatening to expel him from Hogwarts.

The Weasley brothers Ron, Fred, and George arrive in their father's flying car and take Harry to their home. When Harry and the Weasleys go to Diagon Alley for school supplies, they meet Gilderoy Lockhart, a celebrity author who is the new Defence Against the Dark Arts professor. At King's Cross station, Harry and Ron cannot enter Platform 9¾ to board the Hogwarts Express, so they fly to Hogwarts in the enchanted car.

During the school year, Harry hears a strange voice emanating from the castle walls. Argus Filch's cat is found Petrified, along with a warning scrawled on the wall: "The Chamber of Secrets has been opened. Enemies of the heir, beware". Harry learns that the Chamber supposedly houses a monster that attacks Muggle-born students, and which only the Heir of Slytherin can control. During a Quidditch match, a rogue Bludger strikes Harry, breaking his arm. Professor Lockhart botches an attempt to mend it, which sends Harry to the hospital wing. Dobby visits Harry and reveals that he jinxed the Bludger and sealed the portal at King's Cross. He also tells Harry that house-elves are bound to serve a master, and cannot be freed unless their master gives them clothing.

After another attack from the monster, students attend a defensive duelling class. During the class, Harry ends up displaying the rare ability to speak Parseltongue, the language of snakes. Harry, Ron and Hermione initially suspected Draco Malfoy as the possible heir of Slytherin. But after Harry and Ron drink a Polyjuice Potion that allowed them to take the forms of Vincent Crabbe and Gregory Goyle, they discover Draco was not the one releasing the monster. Moaning Myrtle, a ghost who haunts a bathroom, shows Harry and his friends a diary that was left in her stall. It belonged to Tom Riddle, a student who witnessed another student's death when the Chamber was last opened. The monster attacks multiple times, and eventually, Hermione Granger is petrified.