Piranesi by Susanna Clarke — book slip

Piranesi lives in a house unlike any other, a labyrinth of infinite rooms and endless corridors lined with thousands of statues. Within these halls, an ocean is imprisoned, its waves crashing up staircases and flooding rooms. Piranesi is not afraid; he understands the tides and the labyrinth's patterns. His life is dedicated to exploring this mysterious house.

Twice a week, Piranesi is visited by The Other, a man who seeks his help in researching a Great and Secret Knowledge. As Piranesi delves deeper into the labyrinth, he uncovers evidence of another person and a terrible truth that reveals a world beyond the one he knows.