The Book of Mormon is the Word of God

"Our homes are not as strong unless we are using [The Book of Mormon] to bring our children to Christ. Our families may be corrupted by worldly trends and teachings unless we know how to use the book to expose and combat falsehoods in socialism, rationalism, etc. Our missionaries are not as effective unless they are “hissing forth” with it. Social, ethical, cultural, or educational converts will not survive under the heat of the day unless their taproots go down to the fulness of the gospel which the Book of Mormon contains."

("The Book of Mormon Is the Word of God", Ezra Taft Benson, Jan 1988, Ensign)
https://www.lds.org/ensign/1988/01/the-book-of-mormon-is-the-word-of-god?lang=eng