On vision and colors by Arthur Schopenhauer and Color sphere ...
Arthur Schopenhauer & Philipp Otto Runge & Georg Stahl
Letters to a Frenchman on the Present Crisis
Mikhail Bakunin
Collapse VI - GeoPhilosophy
Urbanomic
Socialist Programs
William Gillis
Introduction to Objectivist Epistemology
Ayn Rand & Leonard Peikoff