What is the name of the last book in the main series?

The last book in the main Harry Potter series is Harry Potter and the Deathly Hallows.

Published in 2007, Harry Potter and the Deathly Hallows is J. K. Rowling’s seventh and final novel about Harry Potter. It follows Harry, Ron, and Hermione as they leave Hogwarts to find and destroy Voldemort’s Horcruxes, leading to the Battle of Hogwarts and Harry’s final confrontation with Voldemort.

The title refers to three legendary objects: the Elder Wand, the Resurrection Stone, and the Cloak of Invisibility. Together, they form the Deathly Hallows of the old wizarding tale “The Tale of the Three Brothers.”

Harry Potter and the Cursed Child is sometimes mistaken for the final book because it continues the characters’ stories, but it is a stage play published in script form, not the eighth novel in the original series. The main series contains seven novels, beginning with Philosopher’s Stone in 1997.