Out of the Trap: Selected Lectures of Alan W. Watts
Alan W. Watts
An Elementary Introduction to the Wolfram Language - First Edition
Stephen Wolfram
CK-12 Trigonometry - Second Edition
Ck-12 Foundation
Python für Kids
Gregor Lingl
The a to Z of Sexspionage
Nigel West
Mathematical Optimization and Economic Theory
Michael David Intriligator