Detective novels, suspense novels, and mystery novels are all kinds of novels. The main difference between them lies in the complexity of the plot and the depth of the reasoning process. Detective novels usually used detectives as the main theme. They described the detective's reasoning process and the process of solving the case to reveal the truth behind the crime and the motive of the criminal. The plot of a detective novel was usually more compact, with a lot of suspense and mysteries for the reader to solve. Detective novels often emphasized the ups and downs of the plot and the description of the characters. The difference between suspense novels and mystery novels was that suspense novels paid more attention to the suspense and plot setting of the story while mystery novels paid more attention to the revelation of the truth and the depth of the reasoning process. Suspense novels usually have a fascinating plot and a lot of suspense that the readers need to solve themselves, while mystery novels pay more attention to the analysis and reasoning process of evidence and clues. Mystery novels usually used a complex puzzle as the main theme to reveal the answer by describing detectives and analyzing clues. The plot of a mystery novel was usually more compact, with many details that required the reader to pay attention to and think about.