At the Chicago World's Fair of 1893, Mattie, Sophie, and Alex stumble onto a magical mystery. Young Harry Houdini's magic show is failing, and the kids decide to lend a hand. But before they can sell one ticket, they're accused of stealing a priceless treasure. Can the world's greatest magician help the Time Spies conjure up the real thief? “Mirrorstone offers quality, entertaining fantasy fiction for kids that will turn reluctant readers into lifelong readers,” the company’s Nina Hess told TDmonthly. Launch date: February 2007.