I've read Fight Club and Haunted. To anyone really, I recommend both for various reasons, though they're not my favourite reads by any means.
I've talked about this before, in the Writing forum I think, but it's strange about 'Guts': I read it online first after I was linked to it on the BBS, by TheShrike I think, he made a thread about it. I was already slightly aware of it, and yeah, it did disturb me somewhat, but I could take it quite easily. When I came to re-read it when I had Haunted in my hands, it made me physically uncomfortable. It wasn't the section that he names the most disturbing in the afterword (the line about the vitamin tablet), but rather it was the bit with the hardened candle wax, and the description of the hospital. I really didn't understand why that happened - I bring it up now and then when people begin the e-books vs. books argument, because I think that might've been a factor.
I like 'The Nightmare Box' too, and Mr. Whittier's (first?) one, though I think my favourite might be the foot massage mafia one, because it's hilarious and it's tasty satire. And I think it's the second story in there, so it's a welcome break after 'Guts', though I agree with most fans in that 'Guts' is merely the most flashy and notorious - most people I've spoken to name the mountain lodge one as the most disturbing.
Someone mentioned turning Haunted into a film. It could always happen I suppose, but I think it's written deliberately snidely in order to make that process harder. In the afterword to my copy of Fight Club, he pretty much criticises a certain Mr. Fincher, Mr. Pitt and Mr. Norton and the process in general. I prefer the book of Fight Club to the film believe it or not-
- I just think it does a better job of pointing out the irony of the themes. The film, as expected because it's a big-budget Hollywood film, is too stylised for that in some areas, which isn't a bad thing or anything, but yeah. It's just a constant issue when you're making a film like that. You'll hate me for making the comparison, but it's somewhat like how just about every adaptation of Dr. Jekyll and Mr. Hyde somewhat ignore the possible fundamentals behind the imagery in the original novella.
Maybe I'm wrong for connecting it like that. It just seemed like he was getting a lot of yucks out of it all to me. It made for some of the more enjoyable moments in the 'main' story.