This book is written to enlighten true believers about the current dangers of denominational religion. Paul, in 2 Corinthians 6:17, says, "Wherefore come out from among them, and be ye separate, saith the Lord, and touch not the unclean thing."
Now, the "unclean thing" is Christendom, in allowing and using Bibles that have been corrupted by man, taking away and adding words, thus changing the context and teaching false doctrine, and practicing them.
"And now also the axe is laid unto the root of the trees: therefore every tree which bringeth not forth good fruit is hewn down, and cast into the fire." (Matthew 3:10)