Biocentrism
If you haven't read up on biocentrism, I recommend at least reading the Wikipedia article for an interesting theory about the nature of reality.Robert Lanza, the scientist who proposed this theory in 2007, has a book of the same title, which I've just started reading. He also recently penned an article on The Huffington Post which gives a brief overview of the theory.
Another book that is somewhat related is "Quantum Enigma: Physics Encounters Consciousness", which I read not too long ago and highly recommend.