I Have No Mouth and I Must Scream by Harlan Ellison
This book is actually a collection of short stories by Harlan Ellison. All are sci-fi based in a sense. Some realm of reality on one or two as well. They are mind binding and have an significant meaning through out each of them. He writes stories that just get inside your head.
Read this book, don’t even question it if you don’t like sci-fi or not. This book will take you to a different world and make you think.