In this intricate, magnificently imagined sequel to Blue Balliett's international bestseller, Chasing Vermeer, supersleuths Petra and Calder, along with Calder's old friend, Tommy, are cryptically drawn into another art mystery–this time involving a Frank Lloyd Wright architectural masterpiece, the Robie House.

When the kids' sixth-grade class attempts to save the Hyde Park landmark from demolition, eerie events are reported: voices float out from within, shadows shift behind the art-glass windows, even the roof moves! Suddenly, a well-meaning art restoration project turns into a frightening search for ghosts, hidden treasure, and a coded message left behind by Wright. In this tangled web where life and art intermingle with death and danger, can the kids pursue justice and escape with their lives?