Abstract
Stephens and Grahamset themselves an apparently modest task, to understand why people who experience alien voices and inserted thoughts do not believe that they themselves are the source of these experiences. However, it soon becomes clear that there are many connected issues here. In eight short chapters, they address the phenomenology and ontology of consciousness, the phenomenology of alien voices, inserted thoughts, obsessive-compulsive thoughts and feelings, and other cases of unusual experience often associated with psychopathology, including brief discussion of multiple personality disorder. They survey some of the main empirical explanations of the phenomenology, set out the shortcomings of these theories, and end by proposing their own schematic account.