Someone (or thing) that looks like you/someone you know and then often does some fucked up stuff is pretty scary imo

So this is a list of horror novels featuring the doppelgänger/doppelganger trope

(as a german it is a bit strange that you guys couldn't make up your own word, and the feeling I get when I see the a instead of the ä is a very watered down version of what our poor protagonists are going through rn)