In humanity's quest to understand consciousness, much work has been done at the biological and neural levels, some also in understanding cognitive higher consciousness, and a bit on the contribution and importance of value. But as we have seen, all of this has not led to an understanding of fundamental consciousness. We know a good deal about how the networks of neurons in our heads calculate and process information, shedding light on how we think. This does not tell us how we feel. A mind is thinking plus, especially, feeling. In this book we consider basic mechanisms, the missing explanatory glue from the physical world to value and consciousness. We thus lay out the Sentonic Theory of Fundamental Consciousness (STFC), and discuss the topic of sites in the brain where these phenomena may take place.