Harry Potter and the Half-Blood Prince

The sixth year at Hogwarts begins for Harry in an atmosphere of growing danger. Lord Voldemort has openly returned, and the wizarding world will never be the same. In this installment, J.K. Rowling plunges us into the darkest times, where the line between good and evil becomes increasingly blurred.
Harry, along with Ron and Hermione, return to school, where Professor Dumbledore gives the boy special attention, preparing him for the final battle with the Dark Lord. Together, they explore Voldemort's past, gradually uncovering the secret of his immortality — the Horcruxes. At the same time, Harry begins to notice Draco Malfoy's strange behavior, suspecting that Draco has joined the Death Eaters — Voldemort's followers.
In this book, the mysterious figure of the Half-Blood Prince appears, whose notes in an old Potions textbook help Harry become a true genius in the subject, much to Hermione's annoyance. But who is this Prince, and what are his true motives?
The book is filled with first feelings and jealousy, complex moral dilemmas, and unexpected betrayals. It's a story of growth, loss, and self-sacrifice, leading to one of the most tragic and shocking moments in the entire series, forever changing the lives of Harry and his friends.