This book presents engaging and informative analysis of three interrelated notions, namely: selfhood, the first-person pronoun 'I', and the first-person perspective. Philosophers have long debated about these notions on non-empirical grounds, often focusing on the question of whether the first-person pronoun ‘I’, beyond its role as a grammatical term, has an underlying implication for the ontology of selfhood. Philosophers continuously grapple with whether the first-person pronoun ‘I’ is a referring expression and, if it is, what its referent is or could be. To give an adequate treatment of such questions, philosophers have begun working across the relevant disciplines. This book highlights some excellent examples of the complex nature of first-person thoughts as they figure in linguistics, autism, thought insertion in schizophrenia, and the phenomenon of mental autonomy. In Selfhood, Autism and Thought Insertion, many of the leading philosophers working on this issue, as well as a few emerging scholars, have written 12 new essays addressing questions besetting the ontology of selfhood. The essays address topics as diverse as reflections on E.J. Lowe’s non-Cartesian substance dualism, physical determinism, the metaphysics and anti-metaphysics of the self, animalism, neo-Lockean persons, rationality and the first person, whether the first person is essentially a linguistic concept, first-person and third-person perspectives and autism, consciousness, the first-person perspective and neuroimaging, thought insertion, and mental autonomy. The contributors to this volume do not agree in all of the details associated with the notion of selfhood, yet they all have a common conviction that the central questions besetting it must be taken seriously.