| Great Christian Thinkers | | |
| A World of Ideas: A Dictionary of Important | | |
| The Upright Thinkers: The Human Journey from | | |
| The Triple Thinkers: Twelve Essays on Literary | | |
| The Shadow Club: The Greatest Mystery in the | | |
| My Einstein: Essays by Twenty-four of the World's | | |
| The Peak to Peek Principle: How Possibility | | |
| Philosophy Made Simple: A Complete Guide to the | | |
| Can you speak Venusian?: A guide to the | | |
| Leadership: Essential Writings by Our Greatest | | |
| The Workshop and the World: What Ten Thinkers Can | | |
| The Thinkers Thesaurus: Sophisticated | | |
| Leadership Essential Writings Our Greatest | | |
| Feminist Theorists: Three centuries of key women | | |
| The Positive Thinkers | | |
| The Greatest Thinkers: The Thirty Minds That | | |
| Of Cats and Men: Profiles of History's Great | | |
| Six Existentialist Thinkers | | |
| Fifty Key Contemporary Thinkers: From | | |
| The Routledge Dictionary of Twentieth-Century | | |
