Yes, Melissa knew Klein. In " Lord of the Mysteries," Melissa was Klein's mother. She passed away when Klein was very young. In the novel, Klein recalled the time he spent with his mother many times. Furthermore, at some critical moments, he also felt his mother's existence and protection. In addition, in the later stages of the novel, Klein discovered some secrets about his mother. These secrets revealed that she had once participated in a mysterious organization when she was alive, and that she was related to some powerful forces. These plots further deepened the readers 'understanding of the relationship between Melissa and Klein. Hurry up and click on the link below to return to the super classic " Lord of the Mysteries "!