The Ego Trick 2011 by Julian Baggini explores what the self is and what it isn’t. Baggini is a philosopher who wrote his PhD on personal identity and has written this related book.
The book explores how a curious chunk of matter can house a self, how self changes over time and the nature of our own view of ourselves.
Baggini presents the views of various philosophers and looks at conditions where the self is revealed such as sex changes and mental degradation. How the self reacts when put under extreme conditions is also used to examine what the self is.
Baggini writes well and the book describes a mutable material-self created by it’s own structure with aplomb.