Every night, you mentally disappear for several hours. During dreamless sleep, you are not present to yourself. You have no thoughts, no experience, no point of view. You enter a period mental emptiness, a Black Hole of Nothingness. In the morning, you wake up and resume life as if nothing unusual had happened. But something unusual did happen. You literally lost your mind for several hours. Surely that needs explanation. Similar micro- sessions of nothingness perforate all of life. Introspection cannot penetrate a mental black hole. From the point of view of personal experience, the Black Hole of Nothingness is the edge of the known mental world. Based on a theory of dream formation, Nothing in Mind offers a new first-person method for exploring the deepest recesses of the mind. This is the fourth volume in the Finding the Mind series of award-winning monographs in philosophical psychology.