The Meaning of Happiness
Alan W. Watts
A Guide to Graph Algorithms
Ton Kloks & Mingyu Xiao
The Fourth Dimension - Sacred Geometry, Alchemy, and Mathematics
Rudolf Steiner
Natural Language Processing
Zoran Gacovski
Duelling Idiots and Other Probability Puzzlers
Paul J. Nahin
Princeton Puzzlers (1)
Protection or Free Trade
Henry S. George