The Book of Mormon.
The Angel showed to Joseph where a record of the Nephites had been deposited, and subsequently delivered it into his hands, with interpreters, Urim and Thummim, by means of which the youth translated the record into English and gave to the world the Book of Mormon. It was so named for its compiler, the Nephite prophet Mormon, whose son and survivor, Moroni, had buried the metallic plates containing it in a hill, where they were found September 22nd, 1823. The Hill Cumorah, called "Mormon Hill" by the present day inhabitants of that region, is between Palmyra and Manchester, in the State of New York. For their belief in the Book of Mormon, the Latter-day Saints are termed "Mormons", and their religion, "Mormonism".
This book tells how the Savior, after his resurrection, made himself known to the Nephites—the "other sheep" referred to in John 10:16—and organized his Church among them, after the pattern of his Church at Jerusalem. Choosing twelve special witnesses, he gave to three of them the same promise that he had given to the Apostle John—that they should remain upon earth, superior to death, and bring souls to Him. He prophesied concerning America, the Land of Zion, the place for the New Jerusalem, a holy city to be built by a gathering of scattered Israel prior to His second coming. The Nephite record, containing the fulness of the Gospel as delivered to that ancient people, is a history of this chosen land and a prophecy of its future. It predicts the great work introduced by the Latter-day Prophet, a work so marvelous in some of its phases that most men reject it, deeming it a fable.
But the Christian world, with the Bible in its hands, should have been prepared for something of this kind. The Hebrew seers prophesied concerning it. Isaiah foretold "a marvelous work and a wonder", declaring at the same time that the wisdom of the wise should perish, and the understanding of the prudent be hid; meaning, evidently, that human sagacity and worldly knowledge would stand confounded before it. That prophet, speaking in the name of the Lord, gave as the reason for such in innovation: "This people draw near me with their mouth, and with their lips do honor me, but have removed their heart far from me, and their fear toward me is taught by the precept of men" (Isaiah 29:13, 14). A brief yet comprehensive description of the state of the religious world at the time of the advent of "Mormonism".