Which Harry Potter book did J.K. Rowling publish in 2000?

J.K. Rowling published Harry Potter and the Goblet of Fire in 2000.

The 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. Harry is unexpectedly selected as a competitor in the Triwizard Tournament, an international magical contest that brings students from Beauxbatons and Durmstrang to Hogwarts.

The tournament’s three dangerous tasks form the book’s central set pieces, but the novel also develops the return of Lord Voldemort and the growing threat to the wizarding world. The book’s title refers to the Goblet of Fire, a magical object that chooses the tournament champions. The film adaptation, directed by Mike Newell, was released in 2005 and starred Daniel Radcliffe as Harry.