The Old Testament:
There’s the Protestant Bible, the Hebrew Bible, The Greek Bible (the Septuagint). Legend has it that 70 scholars in 70 days translated the entire Hebrew Bible into Greek. Hence the name includes the prefix “Sept-” referring to 70.
Most of the New Testament is written in Greek. The writers of the NT wrote according to their level of education and knowledge, which varied from writer to writer. Aramaic, the language that Jesus spoke, was the language of the common people (e.g. “Throw the cow over the fence some hay.”) but not the language of the upper crust.
The Gospels
The first three gospels are called the “Synoptic” gospels (from the Greek meaning “same view”). Mark was probably written first; Matthew and Luke have similar outlines as Mark. Matthew was a Galilean Jew and wrote his gospel for Jews. Luke was a Gentile scholar. In his gospel, Gentiles and women have a more active role than in the other gospels. Luke wrote two volumes: Luke and Acts.
Hebrews: uses the most eloquent Greek in the New Testament. Maybe it was written by Apollos (see Acts 18:24-28), or by Priscilla (cheers from women everywhere) (see Acts 18:2-4; 18-28).
The Dead Sea Scrolls
Found in 1947, The Dead Sea Scrolls included an almost intact scroll of Isaiah. This manuscript predated existing/known texts of Isaiah by 1500 years, but was practically the same as the later versions of Isaiah. Thus the DSS confirmed the text of Isaiah.
Other tidbits:
Pauline was not Paul’s wife.
2/3 of Job is bad advice.
Proverbs 31: written by the mother-in-law. Behind every successful man is a surprised mother-in-law.