Harry Potter and the Deathly Hallows (Book 5) by J.K. Rowling

Harry, Ron, and Hermione go on a dangerous mission to destroy Voldemort’s Horcruxes—objects containing pieces of his soul. Without Dumbledore's guidance, they face trials that test their friendship and courage.

As the wizarding world falls into chaos under Voldemort's control, the trio returns to Hogwarts for a final battle. They discover the truth about the Deathly Hallows—three legendary magical items—and Harry ultimately sacrifices himself to defeat Voldemort.

In the end, Voldemort is destroyed, peace is restored, and the story closes with a glimpse into the characters’ futures.