Which novel was J.K. Rowling’s first published book?

Harry Potter and the Philosopher’s Stone was J.K. Rowling’s first published book.

Bloomsbury published the novel in the United Kingdom on 26 June 1997. It introduces Harry Potter as an orphan who discovers that he is a wizard and begins studying at Hogwarts.

The book quickly became a major commercial and cultural success. It won the 1997 Nestlé Smarties Book Prize in the 9–11 years category, helping establish the young series in Britain before its international expansion.

The title differs between British and American editions. In the United States, the same novel was published as Harry Potter and the Sorcerer’s Stone. These are not separate stories or separate first novels; they are regional titles for the same opening book.