Four lectures on relativity and space
Steinmetz, Charles Proteus, 1865-1923
Complete Works of Xenophon (Illustrated) (Delphi Ancient Classics)
Xenophon
The Infinite Retina: Spatial Computing, Augmented Reality, and ...
Irena Cronin & Robert Scoble
Principles
Ray Dalio
Beyond Good and Evil: Prelude to a Philosophy of the Future
Friedrich Wilhelm Nietzsche