This book is a collection of 15 essays on important themes in Wittgenstein’s philosophy, divided into three sections. The first section is about philosophy of language, in particular Wittgenstein’s key idea of linguistic normativity. The second section is mainly concerned with important Wittgensteinian contributions to the philosophy of mind and action: his analysis of sensation language, the concept of understanding, the explanation of human behaviour and the concept of knowledge. The final section focusses on questions of value, mainly in aesthetics, but also in ethics and religion.