Jeffrey R. Holland said this quote
“ The Book of Mormon is the keystone of our religion primarily because it is the most extended and definitive witness we have of the Lord Jesus Christ--of our Alpha and Omega, the Key Stone, the Chief Cornerstone of the eternal gospel. Christ is our salvation, and the Book of Mormon declares that message unequivocally to the world. In its message of faith in Christ, hope in Christ, and charity in Christ, the Book of Mormon is God's new covenant to his children--for the last time. ”