The Puzzler's Elusion Revealed

Can you decrypt this cipher?

Need some hints?

Confused? Itís the problem posed in Dennis Shasha's book, The Puzzler's Elusion: A Tale of Fraud, Pursuit, and the Art of Logic. I decided to take up the challenge after I noticed this purple circle on the cover:

Hereís the winning solution:


Iíll post photos of my trip at some point. Stay tuned.