The four-book saga concludes with its most adventurous adventure yet!So there we were in Colorado - me, Raney Meadows, and my three Elemental teammates. We'd just put my father and his demon keeper on ice - well, actually, on the opposite of ice - and now we had to get past a sylph to grab the final Elemental Key from its hiding place at the top of Mt. Elbert. Then, I figured, it would all be over. The demon would have only three of the four Keys he needed to open the Door to the Very Bad Thing that Could Destroy the Earth. So we'd win. I mean, you can't open a door without all the keys, right?Yeah, no. I should have realized it wouldn't matter whether we had the Air Key. That demon - and whoever his Master was - would do whatever it took to open the Door of Doom, even if it meant tricking our band of Elementals into going through a portal of fire to get it done...