There are 9 consecutive eras of OT history, and the ninth era is the subject of today’s study. The Silence Era of OT history. I guess it’s an era of OT history, kind of, though really the era we are talking about, there are no books of the Bible written during this era.
Instead we have the comparison of different cultural realities between the OT and NT to give us insight into the people and events of the Silence Era. We see changes that have occurred between the end of the OT and the beginning of the NT. We also have historical books other than the Bible, that help fill-in the gap between the two testaments.