How many scriptures do Mormons have?
They have four canonized scriptures.
The Book of Mormon
Doctrine and Covenants (D&C)
the Pearl of Great Price
These are often called the standard works.
Mormons view the Bible as the least reliable of their scriptures. Their 8th Article of Faith states: “We believe the Bible to be the word of God as far as it is translated correctly.” Translation here means transmitted. The Book of Mormon says “there are many plain and precious things taken away” from it (1 Nephi 13:28). Mormons believe that down through the centuries the Bible was greatly corrupted.
A UNIQUE TEACHING OF MORMONISM
The scripture which teaches the most unique LDS teachings is D&C. It teaches three kingdoms of heaven, eternal marriage, the possibility of becoming gods, polygamy, redeeming the dead, etc.
Besides these standard works, they also consider the talks given at their semi-annual General Conferences as scripture, especially the talks given by the living prophet. In a classic speech given at BYU, Ezra Taft Benson, who was a president of the LDS Church, said: “The living prophet is more vital to us than the standard works.”