In the Harry Potter book series, what is the title of the fourth novel?

In the Harry Potter book series, the fourth novel is Harry Potter and the Goblet of Fire.

J. K. Rowling’s fourth Harry Potter novel was published in the United Kingdom on 8 July 2000. It is substantially longer than the first three books and expands the story beyond Hogwarts through the international Triwizard Tournament.

Harry is unexpectedly selected as a fourth champion, despite the tournament traditionally allowing one student from each participating school. The competition brings Hogwarts into contact with Beauxbatons Academy and Durmstrang Institute, while the Quidditch World Cup provides another major event early in the story.

The novel marks a major shift toward darker themes. Its ending reveals the return of Lord Voldemort and changes the conflict from a hidden threat into an open struggle. The next novel is Harry Potter and the Order of the Phoenix.