Members of the Church of Jesus Christ of Latter-Day Saints have a wealth of scripture to choose from. The standard works of the Church are: The King James Bible, The Book of Mormon, The Doctrine and Covenants and The Pearl of Great Price. Beyound these tomes there are also the words of the Prophets. Any official announcement made by a Prophet is scripture for Mormons.

This is an important thing to consider when perusing anti-mormon literature. You would think, given several books and thousands of speeches by the Prophets, that detractors of the Mormon Church would have plenty of ammo. But very often they cite sources that are not official proclamations of the Church. One fun example is that Brigham Young prophesied that man would never land on the moon. Young did, in fact, say this, but not in the role of a prophet. I believe he was conducting an informal interview or something. Other examples are citing information from Church newspapers, magazines, pamphlets, etc. The members of the Church are completely capable of totally screwing up the teachings of the Church. Mormons don't consider the Prophet to be above-human either, and he can make mistakes and say incorrect things in his daily life.

Besides the Catholic Church, I'm not sure of too many other religions that have so much information available with so little contradictions.

It's worth noting that the Church has made statements that other books, like the Book of Mormon may be released in the future. The Book of Mormon itself is an abridgement of a much larger collection of writings by ancient Prophets. The catch is that this won't happen until the members of the Church start fully utilizing what they already have.