For twelve long years, the dread fortress of Azkaban held an infamous prisoner named Sirius Black. Convicted of killing thirteen people with a single curse, he was said to be the heir apparent to the Dark Lord, Voldemort.

Now he has escaped, leaving only two clues as to where he might be headed: Harry Potter's defeat of You-Know-Who was Black's downfall as well. And the Azkaban guards heard Black muttering in his sleep, "He's at Hogwarts... he's at Hogwarts."

Harry Potter isn't safe, not even within the walls of his magical school, surrounded by his friends. Because on top of it all, there may be a traitor in their midst.

J.K. Rowling is the author of the seven Harry Potter books, which have sold over 500 million copies, been translated into over 80 languages, and made into eight blockbuster films. She also wrote three short series companion volumes for charity, including Fantastic Beasts and Where to Find Them, which later became the inspiration for a new series of films. Harry’s story as a grown-up was later continued in a stage play, Harry Potter and the Cursed Child, which J.K. Rowling wrote with playwright Jack Thorne and director John Tiffany.

In 2020, she returned to publishing for younger children with the fairy tale The Ickabog, which she initially published for free online for children in lockdown, later donating all her book royalties to help vulnerable groups affected by the Covid-19 pandemic.

J.K. Rowling has received many awards and honors for her writing, including for her detective series written under the name Robert Galbraith. She supports a wide number of humanitarian causes through her charitable trust Volant, and is the founder of the children’s care reform charity Lumos.

For as long as she can remember, J.K. Rowling wanted to be a writer, and is at her happiest in a room, making things up. She lives in Scotland with her family.