Life's Ultimate Questions: An Introduction to Philosophy
Ronald H. Nash
Philosophy of Mathematics
A. D. Irvine
The Oxford Handbook of Modern Diplomacy
Andrew F. Cooper & Jorge Heine & Ramesh Thakur & Ramesh Chandra Thakur
Intermediate Logic
David Bostock
Our Knowledge of the Past: A Philosophy of Historiography
Aviezer Tucker
The Great Ideas Vol II
Mortimer Jerome Adler
The Great Ideas Vol II - Alternate Version