What is the symbolism of mirrors in the novel, The Mirror Thief?

Mirrored surfaces are present in every scene of the novel to illustrate the notion of secret knowledge hiding in plain sight. The mirror is the central unifying symbol of the story, as it is the ultimate source of mystery that drives the narrative. Crivano’s obsession with the mirror inspires Stanley to seek a world behind the glass, which sets Curtis on his trajectory to search for Stanley. These mirrors also grant the narrator access to observe the other characters.