One of four books Mormons consider scripture. They believe it to be the Word of God "as far as it is translated correctly" (Eighth Article of Faith). When they talk about "translation," they usually mean "transmission." As the Book of Mormon states (1 Nephi 13:28), they believe many plain and precious truths were lost as it was transmitted down through the centuries. Consequently, they consider it the least reliable of their scriptures.
Mormons only use the King James Version (KJV). Contrary to what some think, they have not changed it. Their edition of the KJV includes additional items such as extensive references, their own Bible Dictionary, and portions of Joseph Smith's translation. Most Mormons are not very familiar with the Bible. Christians shouldn't assume that Mormons know even some of the more common Bible stories or verses. Biblical Christianity teaches that the Bible is the inerrant and inspired Word of God. It contains everything we need to know for salvation and godly living (2 Timothy 3:15-17). There are many conclusive proofs of the faithful transmission of the biblical text.