Harry Potter and the Goblet of Fire

In his fourth year at Hogwarts, Harry is mysteriously selected to compete in the Triwizard Tournament, a prestigious but dangerous magical contest. He must face three perilous tasks while balancing his studies and social life. However, the tournament serves as a cover for a much darker plot, leading to a direct confrontation with the revived Lord Voldemort. This installment is widely considered the turning point of the saga, as the story shifts from whimsical adventures to a much more serious and dark tone.