Iggy Peck is an architect at his very core: When hes not making houses out of food, his head is up in the clouds, dreaming of design. So hes totally blown away when Ada Twists 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 somethings not quite right... Everyone says the house is haunted, and it seems that a number of priceless antiqueswhich were supposed to help Aunt Bernice pay for the houses upkeephave gone missing. If they cant find those antiques, Aunt Bernice might lose the house forever. It will take all of Iggys knowledge of architecture and the help of the other QuestioneersRosie Revere, Ada Twist, and Sofia Valdezto solve the mystery and find the treasure!