J.K. Rowling’s main Harry Potter novel series contains seven books.
The series begins with Harry Potter and the Philosopher’s Stone and ends with Harry Potter and the Deathly Hallows. Across the seven novels, the story follows Harry from his first year at Hogwarts through the final confrontation with Lord Voldemort. Each book generally corresponds to a school year, although the final volume extends beyond the usual school structure.
The number seven is sometimes confused by the film count. The seven novels were adapted into eight films because Harry Potter and the Deathly Hallows was divided into two parts. That split does not create an eighth main novel.
Other books connected with the Wizarding World, such as companion works and scripts, also do not change the total. The main Harry Potter narrative written by Rowling is a seven-book series, separate from later stage and reference publications.