anarcho-syndicalism theory and practice by rudolf rocker, it was let's say enligthening, I was already an anarchist before reading it, but now I'm an anarcho-syndicalist

currently reading networking in the rust programming language btw

Dhalgren by Samuel Delany

(Close race with House of Leaves, but ultimately House of Leaves was telling a specific story, whereas Dhalgren is a semi-incoherent drug trip. Loved both books, though.)

Probably some short story I read in high school but from what I can remember the first one that came to mind is Blood Meridian

In elementary school I read this book called "Flawed Dogs" and it was unforgettably wild. It's about a dog who escapes some kinda confinement by jumping over a barbed wire fence and loses his back legs in the process, and then joins a dog gang and does dog gang activities. Also one of the dog gang members was a cat in disguise.
Honestly I should see if I can find a copy of it and reread it. It was pretty wild.

edit: I looked it up and maybe I have a lot of the details wrong but it's still pretty wild

Diaspora by Greg Egan, it's one of the best thought out take on what a post human society could look like. Lots of amazing ideas in the book.

I don't know about wild, but UNSONG has been a very weird trip. It's like science fiction, except instead of science its Jewish kabbalah. There's angels, demons, alt history American politics, religious references that are truly esoteric, and puns... lots and lots of puns.

Kafkas famous book, I think the title is the transformation.

Also Orson Wells about the civil war in Spain. This was not fiction, but it points out so much real life non sense and lies that had my head spinning for most of the book.

Fanged Noumena by Nick Land

Cyclonopedia by Reza Negarestani

Both are a naked lunch level mindfuck. Don't treat it as a book, but rather as a stream of consciousness on the acid trip. Don't try to make any sense, just ride the wave.

"The teachings of Don Juan" by Carlos Castaneda. Read it in highschool and it put me off psychedelics for more than two decades.

Clockwork Orange

Der Prozess (1915) by Franz Kafka, it still is relevant today.

The Wind-Up Bird Chronicle by Haruki Murakami just a magnificent read, you probably couldn’t go wrong with any of his works.

A long way gone by Ishmael Beah was pretty dark. Story of a boy soldier from Sierra Leone explaining how you get forced into it and the terrible things they did.

Sadly, Porn

I don't know how to describe it, expect to be confused and offended and gaslit.

The Fan Man

Kitchen Confidential.

Depends in what way you mean 'wild.' Crazy even psychedelic, but nonetheless benign? Or are we including disturbing?

The multiorgasmic man.