Strange Games

Kitty, Toby, Sam, and Jemima embark on a task for Merlin, jumping into the unknown. But where are they? Why do their surroundings keep changing? Knowing something has gone badly wrong, Lizzie, Luke, Jessica, and two of their friends join them in a weird universe, where they all have to pit their wits against a gamemaster, a gamemistress, and a familiar yet unfamiliar adversary.  How can they escap...