Which J.K. Rowling novel is the fifth Harry Potter book?

Harry Potter and the Order of the Phoenix is the fifth Harry Potter novel by J.K. Rowling.

Bloomsbury published the book in the United Kingdom on 21 June 2003. It follows Harry’s fifth year at Hogwarts and introduces the secret student group Dumbledore’s Army, which Harry, Hermione, and Ron help organize to practise defensive magic.

The novel also features Dolores Umbridge’s appointment as Hogwarts’ High Inquisitor and later Headmistress. The Ministry of Magic’s refusal to accept Voldemort’s return creates a major conflict between Harry and the authorities. The Order of the Phoenix itself is a secret organization founded by Albus Dumbledore to oppose Voldemort.

The book is often remembered as the longest novel in the original series. Its position can be confused with The Goblet of Fire, which is fourth, or The Half-Blood Prince, which is sixth. The title therefore identifies both the installment number and its central resistance group.