The stop motion animation studio Laika — who have made films like Coraline, The Boxtrolls, and Kubo and the Two Strings — have signed on to adapt the novel, so it will be a movie going to the theaters - then maybe to streaming? There is no release date yet for the adaptation.
Finding nothing on IMDb - but an article on Book Riot states...
https://bookriot.com/piranesi-stop-mo...
The stop motion animation studio Laika — who have made films like Coraline, The Boxtrolls, and Kubo and the Two Strings — have signed on to adapt the novel, so it will be a movie going to the theaters - then maybe to streaming? There is no release date yet for the adaptation.