Which Harry Potter book was published seventh and last?

Harry Potter and the Deathly Hallows was the seventh and last Harry Potter book.

Bloomsbury published it in the United Kingdom on 21 July 2007. The novel concludes Harry’s conflict with Lord Voldemort and follows Harry, Ron Weasley, and Hermione Granger as they search for Horcruxes outside Hogwarts.

The title refers to three legendary magical objects: the Elder Wand, the Resurrection Stone, and the Cloak of Invisibility. Together they form the Deathly Hallows, an important symbol and plot element in the final story.

Readers sometimes confuse the final novel with Harry Potter and the Half-Blood Prince, which is the sixth book. The film adaptation was divided into two parts, released in 2010 and 2011, but the source novel is one book.