The Book of Mormon is a sacred text of the Latter-day Saint movement, first published in 1830 by Joseph Smith. It is believed by followers to be a record of ancient American civilizations and their interactions with God, including the teachings of Jesus Christ after his resurrection. The book is divided into several books, each named after its primary prophet or leader. It includes narratives about the Nephites and Lamanites, two groups descended from a family that left Jerusalem around 600 B.C. The text emphasizes themes of faith, repentance, and the importance of following God's commandments.