When the Chamber of Secrets is opened again at the Hogwarts School for Witchcraft and Wizardry, second-year student Harry Potter finds himself in danger from a dark power that has once more been released on the school.
With the future of the wizard world at stake, teenaged wizard Harry Potter enters into his final battle against the evil Lord Voldemort. Potter turns to friends, teachers, and other members of the Order of the Phoenix for help in defeating Voldemort's forces. The discovery of spies within the Order forces Harry and the others to choose their allies carefully.
Fourteen-year-old Harry Potter joins the Weasleys at the Quidditch World Cup, then enters his fourth year at Hogwarts Academy where he is mysteriously entered in an unusual contest that challenges his wizarding skills, friendships, and character, amid signs that an old enemy is growing stronger.
As they travel through their sixth year at Hogwarts, Harry and his friends receive help from the mysterious Half-Blood Prince in their search for the complete story of how Tom Riddle became Lord Voldemort and find in the process what might be Voldemort's only vulnerability.
When the government of the magic world and authorities at Hogwarts School of Witchcraft and Wizardry refuse to believe in the growing threat of a freshly revived Lord Voldemort, fifteen-year-old Harry Potter finds support from his loyal friends in facing the evil wizard and other new terrors.