This is a book which almost all philosophers will want to own. The essays are of a very high standard, and they deal with matters of considerable philosophical importance. In almost every way, the editors - and authors - should be congratulated for the fine work which they have done.

Australasian Journal of Philosophy

This book is like a box of chocolates: once you've looked at the contents page, you know exactly what you're going to get - but this does not mean that the pleasure of consumption is in any way diminished .

Australasian Journal of Philosophy

Helpful introduction ... The final paper to be considered, by Christopher Peacocke, is also the richest and most challenging ... truly essential reading for anyone with an interest in the a priori.

Mind