Some great art work of Tokyo scenes like Shibuya as if all humans were gone for about 50 years. Tokyo Genso (Fantasy). Reminds me of the book out a couple of years ago, The World Without Us, by Alan Weisman.
A very interesting linguistic analysis of the Beatles songs, and how meaning is conveyed by chord change. Written by Ger Tillekens from the Netherlands, this requires some knowledge of music, and of linguistics, but is an amazing look at how the two interact to provide meaning.