This is a hall of judgement well described. None of this was ever described in the Hebrew bible but it was certainly part of the associated lore.
When evaluating a body of spiritual work one can go two ways. One can assume vast interpolation of a known text or one can assume that the known text is an edited version. Or alternately one can frame it as a channeled work of more recent history. All these are difficult.
The rhythm of the language is clearly tailored to an oral tradition of sharing. It is highly repetative in pattern but not in content and most of the material so far shows that.