Iggy Peck is an architect at his very core: When he’s not making houses out of food, his head is up in the clouds, dreaming of design. So he’s totally blown away when Ada Twist’s Aunt Bernice inherits an old house from ice-cream mogul Herbert Sherbert that is filled with countless rooms from all his favorite architectural periods. But something’s not quite right . . . Everyone says the house is haunted, and it seems that a number of priceless antiques—which were supposed to h