Bertrand Russell's study of the philosopher and mathematician Gottfried Leibniz is one of Russell's earliest books and gives us a fascinating glimpse of his philosophical brilliance. This Routledge Classics Edition has a new Foreword by Richard T. W. Arthur.

In An Inquiry Into Meaning and Truth, Bertrand Russell returns to philosophy after a long period of writing about education, religion and marriage. This Routledge Classics edition includes a new Foreword by Pascal Engel, placing Russell's book in helpful philosophical context.

Mysticism and Logic is one of Russell's most celebrated collection of essays. It sets the tone for analytical philosophy in the English-speaking world and is Russell's first foray into the role of public philosopher. This Routledge Classics edition includes a new Foreword by Bernard Linsky.

Logic and Knowledge presents Russell's most important work on these topics in a single volume, which by placing philosophical logic at its core was of monumental importance in shaping the path of analytical philosophy. This Routledge Classics edition includes a new Foreword by Graham Stevens.