We should not be afraid to do research outside of the Bible. There are still many other things to be found, by doing so, that Jehovah’s people have yet to learn. To stop researching our Faith would be a big mistake. If we have “The Truth” than there is nothing to fear from such investigations. The trinitarians who say there is only one Bible the right one are giving several reasons for atheists and people against God to have enough proof to show them they are wrong also in their belief of God, because their sayings or words even do not match the bible words or ancient manuscript words and as such those people give a proof there would not exist a God.
In the first three parts of the Bible (Torah or Law, Prophets and first or Hebrew Writings) the focus is on showing Who is behind everything and What is His Name and Plan or purpose with the universe and mankind. The last three parts (the 2nd or Messianic writings) present with the writings of the apostles (gospels and Acts of the apostles), letters from the apostles and the Revelation of John, the solution God has for mankind and shows the way to God and to the Kingdom of God.