1962 novel by Kōbō Abe.
The entire time I was reading this I was confused. When you finish it however, you come to a consensus that this is a powerful book. It holds a lot about what makes us humans and not bugs. (You’ll get that joke when you read it.)
This is something you’ll have to devote yourself to in order to understand it fully, but it’s absolutely worth it when you come to the climax and conclusion of the novel.