The City and the Stars and the Sands of Mars
Arthur C. Clarke
Against the Fall of Night (1)
About Time: Narrative, Fiction and the Philosophy of Time
Mark Currie
Stranger in a strange land
Robert A. Heinlein
Remarks on the History and Philosophy of Mathematics
Robert L. Long
Gurdjieff and Blavatsky - Western Esoteric Teachers in Parallel
Johanna Petsche
Nine Lenses on the World: The Enneagram Perspective
Jerome Peter Wagner