A Tour Through Graph Theory
Karin R. Saoub
On Riemann's Theory of Algebraic Functions and Their Integrals
Felix Klein
Dover Books on Mathematics (1)
Philosophy for Life and Other Dangerous Situations
Jules Evans
The Cambridge Handbook of Thinking and Reasoning
Keith J. Holyoak & Robert G. Morrison
21 Lektionen für das 21. Jahrhundert - Alternate Version
Yuval Noah Harari
Space Relations
Donald Barr