"my marriage had given me access to a jinn's treasury"
are genie-type creatures from Islamic and Arabic folklore. The word means 'hidden', as they are said to inhabit a dimension seperate, but parallel, to that of humans. Like people, they have free will, and can use this for good or evil; they also have similar social conventions and rites of passage. They have been referred to since ancient times, but it is through Islamic mythology that their characteristics developed. There are three large stones depicting jinns at the entrance to the ancient city of Petra
, in Jordan
, which is famous for its treasury.