suggestions for books similar to bugonia/save the green planet or about conspiracy theorists in general?

i recently watched bugonia and i want to find more books with similar vibes/themes. i like books about people who are experiencing delusions or into conspiracy theories. for example, i really like earthlings by sayaka murata. anything like this, whether it is a horror, sci-fi, thriller, etc. any suggestions would be really appreciated, or if anyone could point me to a sub that might have better recommendations