What LDS apparently believe is the Book of Mormon:
Nephi testified that the Bible once contained the fulness of the gospel of the Lord, of whom the twelve apostles bear record and that after [the words] go forth by the hand of the twelve apostles of the Lamb, from the Jews unto the Gentiles, thou seest the formation of that great and abominable church, which is most abominable above all other churches; for behold, they have taken away from the gospel of the Lamb many parts which are plain and most precious; and also many covenants of the Lord have they taken away (1 Nephi 13:24, 26).
Boyd K. Packer, Who Is Jesus Christ?, Ensign, Mar 2008, 1219
and Boyd K. Packer, Who Is Jesus Christ?
Jesus Christ, The Son of God - His Life and Teachings - Who Is Jesus Christ?
There is an overwhelming lack of understanding in the world in relation to these principles of salvation and exaltation given to prepare mankind for a place in the kingdom of God, and this lack causes many to stumble. There is no excuse on the part of members of the Church, for they have received the necessary revelation directly from the heavens in this Dispensation of the Fulness of Times. The great mission of the Son of God has been revealed in the Book of Mormon and the Doctrine and Covenants more clearly than any other place. Many passages that have been misunderstood, and therefore mistranslated in the Bible, are clarified in these sacred volumes.(Joseph Fielding Smith, Answers to Gospel Questions, 5 vols. [Salt Lake City: Deseret Book Co., 1957-1966], 4:.)
http://www.ldsliving.com/answer09_09.asp
"Wherefore, because you have a Bible you need not suppose that it contains all my words; neither need you suppose that I have not caused more to be written. 2 Nephi 29:10 (see also verses 3-6 )
The Book of Mormon confirms the teachings of the Old Testament. It confirms the teachings of the New Testament. It restores "many plain and precious things" (1 Ne. 13:28) lost or taken from them (see also 1 Ne. 13:2042; 1 Ne. 14:23).
Boyd K. Packer, The Book of Mormon: Another Testament of Jesus ChristPlain and Precious Things, Liahona, May 2005, 69
Requirements for Exaltation
The time to fulfill the requirements for exaltation is now (see Alma 34:32-34). President Joseph Fielding Smith said, "In order to obtain the exaltation we must accept the gospel and all its covenants; and take upon us the obligations which the Lord has offered; and walk in the light and understanding of the truth; and 'live by every word that proceedeth forth from the mouth of God' " (Doctrines of Salvation, 2:43).
To be exalted, we first must place our faith in Jesus Christ and then endure in that faith to the end of our lives. Our faith in him must be such that we repent of our sins and obey his commandments.
He commands us all to receive certain ordinances:
We must be baptized and confirmed a member of the Church of Jesus Christ.
We must receive the laying on of hands for the gift of the Holy Ghost.
We must receive the temple endowment.
We must be married for time and eternity.
In addition to receiving the required ordinances, the Lord commands all of us to--
Love and worship God.
Love our neighbor.
Repent of our wrongdoings.
Live the law of chastity.
Pay honest tithes and offerings.
Be honest in our dealings with others and with the Lord.
Speak the truth always.
Obey the Word of Wisdom.
Search out our kindred dead and perform the saving ordinances of the gospel for them.
Keep the Sabbath day holy.
Attend our Church meetings as regularly as possible so we can renew our baptismal covenants by partaking of the sacrament.
Love our family members and strengthen them in the ways of the Lord.
Have family and individual prayers every day.
Honor our parents.
Teach the gospel to others by word and example.
Study the scriptures.
Listen to and obey the inspired words of the prophets of the Lord.
Gospel Principles
What Is Exaltation?
Exaltation is eternal life, the kind of life God lives. He lives in great glory. He is perfect. He possesses all knowledge and all wisdom. He is the Father of spirit children. He is a creator. We can become like our Heavenly Father. This is exaltation.
Gospel Principles