Raum und Zeit
Roger Penrose & Stephen W. Hawking
Cryptography in C and C++
Michael Welschenbach
Calculus Made Easy
Martin Gardner & Silvanus P. Thompson
Prime Numbers and the Riemann Hypothesis
Barry Mazur & William Stein
Introduction to Mathematica® with Applications
Marian Mureşan
Growth and Structure of the English Language
Otto Jespersen
Principles of Topological Psychology
Kurt Lewin