Harry Potter and the chamber of secrets - J.K. Rowling

arry Potter receives an ominous warning from a house-elf at Hogwarts School of Witchcraft and Wizardry: if he returns to the school at the end of the summer, terrible things will happen. But return Harry must.

His second year begins with a new Defence Against the Dark Arts teacher, Quidditch training and the intensification of old rivalries. Then the warning starts to ring true, as mysterious words are daubed on a wall, students are attacked and Ron's sister, Ginny, disappears. And so the search for Salazar Slytherin's heir begins, with the mystery pointing Harry to a clandestine chamber and a deadly creature at its heart...