This is a very vague recommendation, but I'll try my best to articulate it. I want to read something that feels like a character having autopsy done on their very soul. Throughout the book the main character is forced to look into the mirror and take an honest look at themselves. Their soul is turned inside out and every part of themself is laid bare. The journey towards self discovery is like plunging into deep, black waters. Best examples I can think of are Jacob's Ladder (1990) and the Silent Hill games.
by GingerBr3adBrad