What a pity this book is out of print. Kenny's book on Descartes does not take the reader as far into the deeps of philosophy as Bernard Williams, and the book is not up to date. But Kenny is an intelligent philosopher and, furthermore, he is one of the best writers of philosophical prose. Undergraduates, who have just read some of Descartes' own work can read Kenny, understand the issues that he raises and, very often, they will come away with some idea of where they disagree with Kenny. This is an excellent book for teaching students, by example, how to respond intelligently to the thoughts of a great philosopher.