This book serves as a gentle primer on the philosophy of mind for those wishing to directly explore the strange subjective aspects of psychedelics, providing the means for novices to get to grips with the mind before disrupting it. The discussion includes both classic issues from philosophy of mind, as well as more recent developments in the science of mind. It is set across six key thematic areas: The Hard Problem of Consciousness; Problems of Measurement; Kinds of Minds; The Relation between Mind and World; Problems of Selfhood; and Making sense of Altered States. An introductory chapter orients readers in the basics of philosophical thinking concerning the nature of the mind. This text appeals to researchers and students in philosophy as well as to the general audience.