Enthralling novelist Sean Monaghan throws readers yet another curveball. Crispin Calderton listens to soft piano music in his cool office at tip of CeeVoll 617's spire. A brief respite from governing the million or more people living hardscrabble lives on the floors beneath. Meanwhile, hundreds of floors down, Ernst Marbee finds himself swept up in Abie's explorations. After all, there must be treasures worth discovering in the city tower's labyrinthine structure. What they find, though, might threaten their very understanding of their lives. Another brutal, compelling, high-concept action-adventure from the author of Spin Trap and the Wildest Skies series.