The apocryphal books are accepted by Catholics in their Douay version as inspired of God, but rejected by the rest of Christianity?
Why?
When you examine the reasons for and against acceptance of the Apocrypha as divinely inspired or not, it dawns on you that the traditionally accepted 39 books of the Hebrew Scriptures are nothing but the same sort of stuff as the more recent apocryphal books are, with the only difference being that the 39 much older OT books contain a lot more scary stories, fables and mythology invented by the ancient Jewish priesthood to frighten their followers into fear and obedience and continued giving of meat sacrifices for the priests to eat.
Ultimately, the OT can be summarised as nothing but a mixture of relatively accurate historical Jewish war histories and genealogies, such as the Aprocrypha is, mingled with scary stories made up by the ancient Jewish priests and scribes.