The “Third Book Of Baruch”

Synopsis
There are a plethora of books by, and/or attributed to the prophet scribe Baruch, or another person named so:

There are the first two books, Baruch, and The Apocalypse Of Baruch, both of ancient origin, while there is a third book from the 3rd century, pseudepigraphal in nature, The Greek Apocalypse Of Baruch.

The fourth is found in some Ethiopian Bibles, as an appendix to the Book Of Jeremiah, called the Paralipomena Of Jeremiah (or, The Rest Of The Words Of Baruch).

The fifth is a Gnost Text, which has no connection the prophet, but only to a spirit being bearing the same name.

As well, the Beta Israel Jews have a text called the Apocalypse Of Baruch, which is completely unique.

Then there are two other texts (the first being present here). One is quoted by the Church Father Cyprian, where he simply states the sayings are from a “Book Of Baruch.” Finally, there is a damaged quotation from “Baruch” in the Revelation Of Stephen.

Canonicity
Though not part of any canon, it could be that the early church saw it as inspired.

Dating
500 BC?

Cyprian, Testimonia iii. 29
1 For the time shall come when ye and those that come after you shall seek me, desiring to hear a word of wisdom and understanding, and shall not find it.

2 But nations shall desire to see a wise man, and it shall not happen to them. Not that the wisdom of this world shall be lacking or shall fail the earth, neither shall the word of the law be wanting to the world.

3 For wisdom shall be among a few that keep watch and are silent and talk with one another in quiet, because some shall be afraid of them and fear them as evil men.

4 But these shall not even believe the word of the law of the Most High, and others gaping with their mouths shall not believe and shall believe, and shall be contradicting and contrary, and obstructing the spirit of truth.

5 And others shall be wise with the spirit of error and uttering their own words as the sayings of the Most High and the Mighty, and others shall be weak in faith: others capable and strong in the faith of the Most High and hateful to him that is strange thereto.