On vision and colors by Arthur Schopenhauer and Color sphere ...
Arthur Schopenhauer & Philipp Otto Runge & Georg Stahl
On the Fourfold Root of the Principle of Sufficient Reason and ...
Arthur Schopenhauer
Flowers of Evil: A Selection
Charles Baudelaire
Menschliches, Allzumenschliches: Ein Buch für Freie Geister
Friedrich Wilhelm Nietzsche
Free Software, Free Society
Richard Stallman
In the Beginning...was the Command Line
Neal Stephenson