Writing a mystery novel requires some basic skills and precautions. Here are some suggestions for novices to write a mystery novel: 1. Decide on the theme and background of the story: Before you start writing a mystery novel, you need to know the theme and background of the story. Deciding the time and place of the story and the relationship between the characters would help to construct the world and plot of the story. 2. Design puzzles and clues: Puzzles and clues are an important part of mystery novels. He needed to design some interesting puzzles and clues to make the readers interested enough to pursue the answers. These clues could be hidden in the various details of the story, such as the expression, language, and behavior of the characters. 3. Establishing character relationships: Character relationships are very important in mystery novels. It was necessary to design some complicated relationships between the characters so that the readers could understand and trust the characters 'personalities and behaviors. At the same time, these relationships needed to be reflected in the story. 4. Master the rhythm and suspense: When writing a mystery novel, you need to master the rhythm and suspense. He wanted the story to be fast and exciting for the readers. At the same time, he had to maintain the suspense so that the readers would have enough interest to pursue the answer. 5. Increase logic and rationality: Mystery novels need to have sufficient logic and rationality. The readers needed to be able to understand the various inferences and guesses in the story and be able to prove the accuracy of these inferences and guesses. 6. Pay attention to details and description: Mystery novels need to pay attention to details and description. It was necessary to describe the expressions, language, and actions of the characters so that the readers could understand their personalities and emotions. At the same time, he also needed to pay attention to the details of the plot so that the readers could understand the plot and the relationship between the characters. Writing a mystery novel required constant practice and exploration, hoping that the above suggestions could give some inspiration and enlightenment.