Some readers might be disappointed if they didn't include a murder in a mystery novel. However, if you want to improve the quality of the novel, you can consider the following points: 1. Adding plot twists: By adding plot twists, the reader will feel surprised and nervous during the reasoning process. For example, setting up a seemingly harmless scene at the beginning of the novel and then gradually leading the reader into the suspense through a series of clues. 2. Increase the character's personality: By portraying the character's personality, it is easier for the reader to get involved in the plot. For example, designing a smart, witty, and brave character or a calm, observant character. 3. Increase clue settings: By increasing the clue settings, the reader can make the reasoning process more smooth. For example, he could design some hidden clues to let the readers gradually discover the truth. 4. Increase Reversal: An unexpected reversal in the process of reasoning will surprise and shock the reader. Increase the tension: By increasing the tension, the reader will be more involved in the plot. For example, by setting suspense, creating contradictions, and strengthening tension, the tension of the novel could be increased. If you want to write a good mystery novel, you need to constantly practice and try to improve the quality of the novel through the above suggestions.