I'm only about 1/5 of the way through it, but wow. Heard of it?

House of Leaves wikipedia page for the lazy:
http://en.wikipedia.org/wiki/House_of_leaves

So it's mostly a horror story about a house that has some strange metaphysical business going about. What's really strange about it is the way it's type-set... I mean, just look at this thing. Plenty of insanity and drug abuse also.

Anyway the thing is rather dense in some places (near the start especially - I've spent hours reading just to make it through the first 100 pages) because of its content (and formatting), but it's a damn good story so far and you should have a look.

tl;dr: horror story, sex, drugs, crazy folks, go buy it