Looking for Psychological thrillers In books? (More “and then there was none” less Coleen Hoover).

I would kill to find actual Psychological thrillers, along the lines of "and then there was none". Where you don't know how where what or why..

I've tried joining a few Facebook groups, but not much actually psychological thrillers or nerve wrecking suspense to be found…

So hoping reddit can help where Facebook can't.