Which Harry Potter book did J.K. Rowling finish the series with in 2007?

J.K. Rowling finished the Harry Potter series with Harry Potter and the Deathly Hallows in 2007.

The seventh and final novel was published in the United Kingdom on 21 July 2007. It follows Harry, Ron, and Hermione as they leave Hogwarts to find and destroy Voldemort’s Horcruxes. The title refers to three legendary magical objects: the Elder Wand, the Resurrection Stone, and the Cloak of Invisibility.

The book became a major publishing event, with millions of copies prepared for its worldwide release. It received generally positive reviews and won several awards. The English-language edition contains 607 pages in the United Kingdom edition.

Harry Potter and the Half-Blood Prince was the sixth book, published in 2005. The film adaptation of Deathly Hallows was divided into two parts, released in 2010 and 2011.