Harry Potter and the Half-Blood Prince

It is the middle of the summer, but there is an unseasonal mist pressing against the windowpanes. Harry Potter is waiting nervously in his bedroom at the Dursley´s house in Privet Drive for a visit from Professor Dumbledore himself. One of the last times he saw the Headmaster was in a fierce one to one duel with Lord Voldemort, and Harry can´t quite believe that Professor Dumbledore will actuallyappear at the Dursley´s of all places.

Why is the Professor coming to visit him now? What is it that cannot wait until Harry returns to Hogwarts has already got off to an unusual start,as thw words of Muggle and magic start to interwine...