The Lathe of Heaven (1971)
Ursula K. Le Guin (writer).
Read in 2019.
A wonderful study of the imagination, of worldbuilding and of the writing process.
References here: Always Coming Home (1985), Among Others (2011).
The Lathe of Heaven (1980) IMDb
fiction moving picture
Viewed 2019-08-25. Ugly in unsafe old browsers.