Chill factor. Rachel Caine. 2008.

Weather Warden extraordinaire Joanne Baldwin, who protects the human race from monster storms, was killed, reborn as a Djinn, and then restored to her original form. She’s been through a lot -and stuck her neck out many times - to save innocent lives. Now she is rolling the dice to stop an infinitely powerful, deeply disturbed kid from destroying the world…..

A teenager has holed up in style at a Los Vegas hotel with the most powerful Djinn in the world, planning who knows what kind of mischief. The Wardens senior leadership is dead. Djinn are disappearing, and a secret society wants to help Joanne destroy the teenager, even if doing so kills her again. But everybody in Vegas has a game going, and Joanne has to learn the rules fast because the stakes have never been higher - and all hell is about to break loose………