Possible Worlds: An Introduction to Logic and Its Philosophy
Raymond Bradley & Norman Swartz
Mathematica® as a Tool: An Introduction with Practical Examples
Stephan Kaufmann
C. S. Lewis - A Very Short Introduction
James Como
Advanced Mathematics 2
C. W. Celia & A. T. F. Nice & K. F. Elliott
Modeling with UML: Language, Concepts, Methods
Bernhard Rumpe
The Ultimate Encyclopedia of Mythology
Arthur Cotterell