Which Harry Potter novel did J.K. Rowling publish in 2007 as the series finale?

J.K. Rowling published Harry Potter and the Deathly Hallows in 2007 as the series finale.

The novel was released in the United Kingdom on 21 July 2007. It follows Harry, Ron, and Hermione as they leave Hogwarts to search for Horcruxes and oppose Voldemort. The story resolves the series’ central conflict and reveals the significance of the three Deathly Hallows: the Elder Wand, the Resurrection Stone, and the Invisibility Cloak.

Deathly Hallows was the seventh and final main Harry Potter novel. Its release was accompanied by intense worldwide anticipation, with midnight sales events held in many countries. The book became one of the fastest-selling novels in publishing history.

The title can be confused with Harry Potter and the Half-Blood Prince, the sixth book, published in 2005. The final novel was later divided into two feature films, released in 2010 and 2011.