Not of vital importance, but it’s at least something I know about.
Margaret Mitchell lived for another fifteen or so years after publication of her only book, but never wrote anything else. She didn’t really like fame and Gone With The Wind essentially ruined her life. She was never again able to live an ordinary private life, as she wanted (she liked to be the centre of attention, but only of a small circle).
She was adamant that there would NEVER be a sequel (and would be spinning in her grave right now).
She was going to the movies with her husband when a drunk driver knocked her down.
If this interests anyone (well, they’d be here if they were anywhere) there’s a terrific biography called “The Road to Tara” by (I think) Ann Edwards. Tells you who Rhett was in real life.
Rhettboss
(my first post in this forum - gee it’s clean in here. Smells good too!)
The SF writer Tom Reamy only finished one novel, “Blind Voices”, before his early death.
John Kennedy Toole wrote a second book, “The Neon Bible.” It was actually written before ACOD, but sat in a drawer for 35 years until his estate was settled.
Kesey, Heller, and F. Scott Fitzgerald all wrote multiple novels.
Baroness Orczy wrote upwards of a dozen Pimpernel books, IIRC. I’ll concede, however, that we can grant her one-hit-wonder status for only having one standout character.
Historically? Kate Chopin. However, from what my crit. lit. professor said she was so reviled by critics for The Awaking’s boldness, and was unable to publish any other novels. It’s a shame too, that novel and her short stories were thought provoking.