Mystery novels and detective novels are both literary works that contain reasoning and detective elements, but the plot and theme are different. Mystery novels usually revealed puzzles, analyzed clues, cracked codes, and other methods to allow the reader to grasp more information in the story and draw conclusions. The plot of this kind of novel was usually more complicated and the characters were more varied. The focus of mystery novels was to let the readers get the correct answer through logical reasoning and detailed analysis. Detective novels, on the other hand, used the detective character as the protagonist to investigate clues, analyze evidence, and solve mysteries to solve the case. The storyline was usually simple, with the main goal of revealing the truth of the crime and finding evidence. The characters in detective novels are usually more singular and their personalities are more straightforward, making it easier for the readers to understand and empathize with them. Although mystery novels and detective novels are different in terms of plot and theme, they also overlap in some aspects. For example, mystery novels and detective novels included elements such as finding clues, analyzing evidence, and solving mysteries. They were all based on facts and evidence to advance the story.