I'm a regular subscriber to the Folio Society so when they started promoing Piranesi, I was intrigued... not enough to drop $90 on THEIR edition, but enough to check out a less expensive version. 😉
https://www.foliosociety.com/usa/fiction/piranesi
It's a strange book... very metaphorical. I'm not sure what to make of it yet. The protagonist, Piranesi, exists in a series of marble hallways filled with statues and they have been there several years.
They have memory lapses and have been documenting everything in a series of notebooks. There is one other living person, whom they call "The Other" and the skeletal remains of 13 other people.
The hallways exist on three floors, a lower level, open to the sea, where Piranesi can fish in order to survive, an upper level, open to the sky, where rain water collects, and a middle level isolated from the tides below and the storms above, that is habitable.
It's not a BAD read, but definitely not for everyone. Reminds me a lot of experimental 1950s stage plays like Samuel Beckett or Harold Pinter.