The Church has done a wonderful job, putting movie to Elder Holland's recent testimony of the Book of Mormon.
I know it to be true as well. How thankful I am for that companion to the Bible and my own witness of both works of holy writ. What strength and comfort they have given me, what knowledge of God and His purposes. I love the Book of Mormon. I love the prophet Joseph and my Savior Jesus.
To find out more or for your own, free copy of The Book of Mormon: Another Testament of Jesus Christ or The Holy Bible, see the appropriate link.