This is book number four in the series that J.K. Rowling wrote and in this book: Harry Potter is back with the Dursleys in Privet Drive again. As he woke from a dream because his scar had hurt.
Then he made himself think what it was about, and Harry was surprised about how long it took him to think about writing a letter to Sirus his godfather.
He then gave the letter to his owl Hedwig but when he got a reply back later on in the story Harry wished he hadn’t sent it. The Dursleys also got a letter from Arthur and Molly Weasley saying that they got tickets for the Quidditch World Cup, and as they have invited Harry, they will be picking up Harry in their usual way.
However, the Dursleys assumed that the Weasley’s, will be picking up Harry in a car. As the Dursley’s didn’t think that Arthur and three of his sons would arrive trapped in their blocked fireplace, and that was because they had an electric heater.
Though that wasn’t the only surprise in the story!