House of Leaves by Mark Z. Danielewski, if you haven't read it, do it. It's a really unique book, but tends to require alot of intellect so that you're not confused. The book in a way resembles a puzzle, and even has alot of spoilers out on the web, to solve its many wonders.
I highly recommend that you do NOT look up anything about the book, because nearly everything is a spoiler. (I know this makes this difficult). You'll immediately know that the book is interesting if you pick up the full color version in any book store and flip through it.
Just to explain it a bit, the character starts to lose his mind in places, and the font goes backwards, upside down, diagonal, and mirrored. It always keeps you on your toes. Different colored fonts mean different things.
The Minotaur is just one example.