How many here have heard of/read House of Leaves by Mark Z. Danielewski? I swear, I am in love with this book. It's more of an art piece than a novel, really. It's about a man who, while helping to clean out the apartment of a recently deceased man, comes across a trunk of obsessive writings and research regarding a film known as "The Navidson Record." The film documents an unexplainable phenomenon -- a man's house is somehow bigger on the inside than on the outside, and over time, it expands within into a labyrinth of impossible scale.
Whether or not the film itself ever existed is unknown, and the "research" he found may be completely fictional, but the madness in the writings infects the protagonist much as it did the old man who wrote them. A story within a story within a story, and you can see the author gradually spiral into insanity on its pages. You'll never see an audio book of this one, and you have to actually see it to understand why. lol
It's beautifully done, and I'd recommend it to any horror fan. Psychological horror at its finest. Danielewski has become an idol of mine, for sure.