From the Introduction:
"This module was created by Robert Kuntz (one of the original founders of D&D), and was to be published by his company, Creations Unlimited (who previously published Garden of the Plantmaster and the four modules in the Zayene series). The company unfortunately went out of business, and the planned series of RPGA modules based on the City of Brass never saw the light of day. Kuntz released this first module to the Internet and it is freely distributable, provided it is kept intact and in its entirety."
...
All of you have been gathered to hear the High Priests of Nusu-Sa's message. Though you have been informed through various sources that the Sun God's edict is forthcoming— no doubt, with a redeeming and accusative quality, as is the case with pronouncements such as these—you are still pensive, and some of you are concerned. As you stand on a humongous rug of white fur, you hear the rustling robes of your religious sovereign as he enters the audience chamber. His steps are measured, as has been his guidance of the Sun God's cause. With a wave of his hand he dismisses the servants; and with the other he bids you a silent welcome. He then sits, and you do so also, reclining upon the thick white furs. As he speaks, he pulls forth a scroll from his vestments and unrolls it. On it are various marks and signs, all painted in fiery red pigments. From your vantage you note a strange land, totally unfamiliar. He sets the map on the rug and waves his arm above it, as if this were a means of introduction.