I wouldn't say "unheard of" but one that is definitely overlooked/underrated (it has 862 ratings on Goodreads): The Tall Woman by Wilma Dykeman

Here is an excellent write-up on it: https://crimereads.com/the-strange-rural-noir-of-wilma-dykemans-the-tall-woman/

I loved Devils in Daylight -- since you liked it, I would also recommend Star by Yukio Mishima!