Psychological thrillers are a genre of fiction that focuses on the mental and emotional states of characters, often exploring themes of fear, obsession, and manipulation. These stories typically involve complex plots that keep readers guessing, as they delve into the minds of characters who may be unreliable or disturbed. In a psychological thriller, the tension often arises from the characters' internal struggles rather than external action. Common elements include suspenseful twists, moral ambiguity, and a deep exploration of human psychology, making them engaging for those who enjoy unraveling intricate narratives. Examples of popular psychological thrillers include Gone Girl and The Girl on the Train.