Amazingly well thought out book, filled with all sorts of great explanations for the objects in conscious awareness - thoughts, sensations, what it is like to be. However, the author never touched on the problem he proposed to solve - the hard problem of consciousness. The machine was explained wonderfully, but the ghost was never touched on. He never explained how an aware observer could arise out of a material reality a instead sticking to the observed objects off awareness. Despite my disappointment regarding this failure, the explanations he does make for the rest of consciousness are fascinating.