everybody agrees that the old testament existed......I need to think of a word that you understand here.....transcribed, formulated, editors of, compiled....O.K., Lets go with that....The Catholics took the old testament from the Jews, wrote down EVERYTHING in the new testament and formulated...compiled the book that we all know today as THE BIBLE.....TA DA!!!!!!see how easy it is???
For those that believe in fiction it must be.