I started House of Leaves a couple times, but I always end up spending more time online than reading fiction. I need to actually sit down and read it. I used to read lots of fiction before my addiction to technology. Every five years or so, I go back and read Herman Hesse's Steppenwolf, but it's a fairly small book to get through. I bought the House of Leaves version that has color coding and bizarre layout (not sure if that was always in every version). I suppose I spend enough time watching horror movies and playing odd games that I could afford the time to read House of Leaves.
I do watch a lot of amateur found footage films on YouTube, along with analog horror. I remember when Blair Witch Project first came out, and it reminded me of strange dreams and nightmares I've had, and I think that's part of where the attraction to liminal spaces comes from. It's something humans can relate to, but it's harder to put a specific label on the feeling you get when consuming this type of content.