Truly unsettling/scary/creepy horror books

Hello, I’m looking for some suggestions for books that genuinely make your skin crawl/scare you/unsettle you/make it hard to go to sleep at night. Not really looking for end of the world type or survival horror books

I’ve read many Stephen King, I loved Pet Semetary & The Shining.

The short We Need to Do Something was creepy.

I loved Heart-Shaped Box by Joe Hill, & House of Leaves gave me the creeps for sure. Looking mostly for this vibe.

I just want to feel deeply unsettled whilst reading it, thanks in advance!