"In Arabian mythology and Islam, a Djinn (also jinn, genie, from Arabic جني jinnī) is a supernatural creature which occupies a parallel world to that of mankind, and together with humans and angels makes up the three sentient creations of Allah. Possessing free will, Djinn can be either good or evil.
The Djinn are mentioned frequently in the Qur'an, and there is a Surah entitled Al-Jinn. While Christianity maintains that Lucifer was an angel that rebelled against God's orders, Islam maintains that Iblis was a Djinn who had been granted special privilege to live amongst angels prior to his rebellion. Although some scholars have ruled that it is apostasy to disbelieve in one of God's creations; the belief in Jinn has fallen comparably to the belief in Angels in other Abrahamic traditions" --from Wikipedia
As a big fan of urban fantasy, I recently came across a series of books by Rachel Cain and they feature the djinn. I must admit that I really do not know very much about them. I was wondering if anyone here comes from or has worked in a tradition which works with the djinn and can say if they a benevolent, malovelent, or benign race and how one would recognize them if one should engage them.