The book is part of the Harry Potter series: 1st Harry Potter and the Philosopher's Stone - 2nd Harry Potter and the Chamber of Secrets - 3rd Harry Potter and the Prisoner of Azkaban - 4th Harry Potter and the Goblet of Fire - 5th Harry Potter and the Order of the Phoenix - 6th Harry Potter and the Half-Blood Prince - 7th Harry Potter and the Deathly Hallows.

'You are sharing the Dark Lord's thoughts and emotions. The Headmaster thinks it inadvisable for this to continue. He wishes me to teach you how to close your mind to the Dark Lord.'

Dark times have come to Hogwarts. After the Dementors' attack on his cousin Dudley, Harry Potter knows that Voldemort will stop at nothing to find him. There are many who deny the Dark Lord's return, but Harry is not alone: a secret order gathers at Grimmauld Place to fight against the Dark forces. Harry must allow Professor Snape to teach him how to protect himself from Voldemort's savage assaults on his mind. But they are growing stronger by the day and Harry is running out of time...