The Works of John Locke in 9 volumes, vol. 1 (1689)
John Locke
The Place of the Sciences of Man in the System of Sciences
Jean Piaget
The Semitic Languages
John Huehnergard & Na'Ama Pat-El
Transcendental Ontology: Essays in German Idealism
Markus Gabriel
Three Uses of the Knife: On the Nature and Purpose of Drama
David Mamet
apt Cheat Sheet
Opensource.com
Exploring Analytical Geometry with Mathematica®
Donald L. Vossler