In addition, the Book of John is not chronologically last in the Bible, it was wrtten before several other books.
Nevertheless, the Holy Bible is God's word and is scrripture.
I will admit to you up front that I am LDS...I joined the church after being raised a Southern Baptist, for which upobringing I will be eternally grateful.
Jesus Christ remains my personal Savior and it is to Him alone that I look for salvation. My church, the LDS faith, teaches that. We do have differences in theology, but realtively speaking, next to the saving atonement of Jesus Christ ad Him crucified, they are minor.
I do not mean to start a flame war or a contentious arguement...I will not participate in any thing like that...just letting you know my understanding and my witness.