Introduction to WordNet An Online Lexical Database
George A. Miller & Richard Beckwith
The Future of Freedom
Fareed Zakaria
Das Wahre, Schöne, Gute: Geist und Kultur im 3. Jahrtausend
Kenneth E. Wilber
The Secrets of Doctor Taverner
Dion Fortune
Historical Dictionary of Ancient Greek Philosophy
Anthony Preus
The Enneagram: Symbol of All and Everything
Nathan Bernier