No bother you being a trinny and all. A lot of that going around. Adding to the scriptures is frowned upon, though. Father and Son make 2 not three. United in One Spirit....not 3 Spirits. God is Spirit and both Father and Son share one Holy Spirit. The Spirit of God and the Spirit of Christ are One."All Scripture is given by inspiration of God, and is profitable for doctrine, for reproof, for correction, for instruction in righteousness, that the man of God may be complete, thoroughly equipped for every good work." 2 Tim. 3:16-17
All 66 books are the word of God, regardless of which messenger wrote it.
Inspired / "God - breathed".
God coummunicated directly or indirectly by putting the words in their minds, exactly how He wanted them to say it. He used their personalities, style of communication, experiences that He brought them through to convey His message.
And of course, the fact that we Trinitarians believe that Jesus is God, everything from the Bible came from Him. This is why He is referred to as the Logos.
I know, it is a conundrum to Non- Trinnys.
It is good that you at least put a value on the Red Letters ... but don't dismiss the rest, they are His as well.
Do the math...1+1= 2 ...We (Father and Son) will make our abode in him. How? By the Spirit.