In early November I ran across a book called Godel, Escher, Bach: An Eternal Golden Braid by Douglas Hofstadter.  I began reading that book recently. Every page seems to be a remarkable insight into the universe. Highly recommended as one of the best books I have ever opened. Check out the following music by Bach: Musical OfferingNever-ending CanonDie Kunst Der Fuge (The Art of Fugue), and Kleines harmonisches labyrinth (Little Harmonic Labyrinth). To complement the book, I purchased the The Art of Fugue by Bach and Tatiana Nikolayeva. The book explains the concept of Godel’s Incompleteness Theorems and their relationship to cognition. (ISBN-13: 978-0465026562)
Also, check out the work of M.C. Escher: Gallery
My Favorites:

Convex and Concave
The Waterfall