1 Nephi 13:29-42 The series of events leading up to the introduction of the Book of Mormon is unsuspecting. The Gentiles are blessed in the land of promise. However, the descendants of Lehi (according to the covenants of the Lord that he made with Lehi) are not utterly destroyed either. They are smitten for a season because they had rejected the truth. Then the Gentiles who had smitten them also "stumble[d] exceedingly" ( see vs. 34 ) because of the many important parts of the Bible that were removed in erroneous translations. Both groups in question had fallen short. It seems that that Book of Mormon didn't come about until the world absolutely needed it. It is characteristically described as containing plain and precious truths, culminating in a witness for Jesus Christ as the Son of the Eternal Father and as the Savior of the world ( see vs. 40 ). In the Savior's own words, he says that in it is "written my gospel... my rock and my salvation," ( vs. 36 )...
A personal study of the Book of Mormon by Brent Leavitt,
a member of the Church of Jesus Christ of Latter-day Saints.