The Selected Letters of Bertrand Russell, Volume 1: The Private Years 1884-1914, Edition 2

The Selected Letters of Bertrand Russell, Volume 2: The Public Years 1914-1970

The Cambridge Companion to Bertrand Russell

The Collected Papers of Bertrand Russell, Volume 2: The Philosophical Papers 1896-99

The Collected Papers of Bertrand Russell, Volume 1: Cambridge Essays 1888-99