Subtitled “Another Testament of Jesus Christ”, it is one of four books Mormons consider scripture. They say it supports and even outranks the Bible as a source of truth.
“I told the brethren that The Book of Mormon was the most correct of any book on earth…and a man would get nearer to God by abiding by its precepts, than by any other book” (Joseph Smith, Introduction to the Book of Mormon).
Mormonism teaches that The Book of Mormon was inscribed on golden plates and delivered to Joseph Smith by the angel, Moroni. It contains the story of groups of Jews migrating to the Americas and their subsequent history. This includes a visit from the resurrected Christ. Non-Mormons are encouraged to read it and prayerfully ask Heavenly Father if the book is true. Surprisingly, it contains very little LDS doctrine.
Mormons highly respect it, even though many have never read it. They know some of its stories, having been taught them since childhood.