Don't believe me?
Here's one of the dialogues in the book (the book alternates between a dialogue and a chapter of real stuff, someting that explains the dialogue). This one is called the "Sonata for Unaccompanied Achilles" where Achilles has a phone conversation with the Turtoise. Escher's piece "Mosaic II" is included below, it will help you with the puzzle =). Follow the link and scroll down a bit...
Beautiful? No? It's a shame that I lack the musical background to fully enjoy the work.
PS: Getting the answer to the puzzles are important.
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