An example of a mystery novel is as follows: I, Alice, am a detective. She gripped the pen in her hand tightly and wrote her name on the paper. I've been investigating for an entire day, but I haven't found any clues. She sighed, closed her eyes, and took a deep breath. But I know one thing. I have a friend named Jack who was recently murdered. Alice's breathing suddenly became rapid. Her heart began to beat faster. She felt a butterfly appear in her hand. She held it in her hand and observed it carefully. I know it's strange, but I can't think of anything else. I can only continue to investigate and see if I can find more clues. She opened her notebook and began to record the results of her investigation.