Whether the Dark Ones were terrifying or psychological crimes were terrifying depended on one's definition and preference of terror. The Dark One was a horror novel with a crime theme. It mainly told the story of a detective who went deep into a criminal organization to expose the dark forces. The characters in the novel, including the psychologist, the killer, the police, etc., their behavior and psychological activities were described in detail, which easily caused the reader's fear and uneasiness. The psychological crime was a horror novel with psychological suspense as the theme. It mainly told the story of a police officer who found a deeper psychological mystery hidden behind the case by investigating a series of suspicious cases. The characters in the novel included the psychologist, detective, criminal, etc. Their psychological state and personality characteristics were all deeply described, which easily aroused the curiosity and desire of the readers. These two novels were excellent horror novels. The readers could choose according to their preferences and horror tolerance.