Horror books with shocking twisted haunting twists or endings that leave you speechless and thinking??

Hi guys I’ve struggled a lot to find sth like that. My favorite books/stories are these:

I have no mouth and I must scream
The enigma of amigara fault
Blood meridian
Tender is the flesh
The frolic
House of leaves
The human chair
Psychosis creepypasta
Revival

I found all these deeply disturbing and shocking and I was wondering if there’s anything else like that

If you know anything similar pls let me know!