Portal of Chaos - Island of Fog, #13

A group of thirteen-year-old shapeshifters are sent on a rescue mission to the thirteenth floor of a highrise building where something terrible lurks. The people of Old Earth are busy rebuilding their towns and cities, putting industries back to work, and forging new communities, all the while getting to know their newfound neighbors-a parallel world full of mythical creatures, magic, and wonder! But magic isn't always good.
Sometimes it's downright evil. In a newly restored city, something disturbing has happened in an office building. People have vanished without trace, and rescue teams can't get past a pack of deadly hellhounds. The situation is well beyond Old Earth's capabilities, and the authorities request the help of Miss Simone and her team of shapeshifters. With Friday 13th coming up in a few days, is it too much to hope that luck will be on their side?