Book excerpt: "Consciousness isn't a thing you can poke a stick at. It's not a natural kind, like a bit of quartz, or quarks, or water. Like "life," which can be attributed to many entities, but is not a thing with reality apart from living entities, consciousness can be attributed to conscious entities without being some further thing or fact, some mysterious, mentalizing "force" that can exist without conscious entities. It is manifested in conscious states and creatures, but isn't a thing in and of itself. One of the enduring puzzles about consciousness and conscious states is how they, as apparently mental, nonphysical states, can manifest in a physical entity like a brain. We can point to a physical bit of brain, to a neuron, or a structure like the thalamus, but we can't locate the consciousness within that bit of brain or its neural cells"--