The novel explores themes related to the afterlife, eternal progression, and the concept of marriage and relationships in the context of Mormon theology. The story follows the lives of characters before and after death, depicting their spiritual journeys and experiences in the next life."Added Upon" delves into Mormon beliefs about the pre-mortal existence, the purpose of life on Earth, and the potential for eternal progression and exaltation. Through its narrative, the novel aims to convey moral and spiritual lessons while offering insights into Mormon teachings about the nature of God and the plan of salvation.Nephi Anderson's writing style in "Added Upon" is characterized by its moral earnestness, didacticism, and emphasis on religious themes. The novel has been cherished by many members of The Church of Jesus Christ of Latter-day Saints (LDS Church) and has remained a significant work within Mormon literature for its exploration of spiritual concepts and its reflection of Mormon beliefs and values.