This book and others like it have the same problem you have, they cannot produce the MSS evidence to prove their claim. All they have is speculation and conjecture upon which to build their arguments.
I'm not arguing, even though others have started one. The book I refer to doesn't contradict the KJV which is my favorite. Why not study different interpretations of scripture as long as they don't conflict with the truth? With this said, King James was no saint. This book, that I now have, gives greater clarity to certain words that were used during the time period that the New Testament was written. It is not the main Bible that I read. I don't understand the argument over translations coming up all the time. This thread is not about what translation of the Bible is the best or worst. There are many I'm sure you have no problem with.