Rowling uses the second book to deepen the series' social and moral complexity:
The story begins with Harry spending a difficult summer with the Dursleys, where he is visited by Dobby, a house-elf who warns him not to return to Hogwarts due to a "mortal threat". Despite this, Harry returns to school and soon discovers that someone has reopened the legendary , an ancient hidden room created by Salazar Slytherin. Harry Potter Y La Camara Secreta J K Rowlin...
Students are found "petrified" (turned to stone), and messages appear on the walls written in blood. Rowling uses the second book to deepen the