I did read American Psycho. It scared the sh!t out of me TBH. I'm still scared to rent the movie even though it has mega hot Christian Bale, even though I'm told it's not as insane as the book.
Oddly I noticed that Patrick Bateman is a peripheral character in the Rules of Attraction, he's the brother of Sean Bateman, a character in that book. Anyone who screwed around a lot in college, or would like to, should read the Rules of Attraction. At the very least, you'll be entertained, and it's dated enough to be nostalgic for people over 30.
Sig Credit to Toxic