The Book of DieselThe Light Before the Gospel“Anahita hid medical supplies in a storeroom with copies of the Keepers' records. The archive was not the Avesta and never claimed to be. It was smaller: workers' names, private letters, objections to kings, stories of mixed families, and the seal's oath.”
The Book of Diesel · Gospel Threshold Edition v4.5
Historically anchoredThe setting or public event is documented; dialogue, motives, and recurring characters are invented.
Alexander occupied and burned Persepolis; motives and circumstances are debated, and later Zoroastrian tradition remembered him as a destroyer of religion.
The rescue of the Keeper archive and the exact library fire are fictional; claims of Avesta destruction belong to later tradition and are labeled as such.