Personality Types: Using the Enneagram for Self-Discovery
Don Richard Riso & Russ Hudson
Schaum's Outline of Mathematica®, Third Edition
Eugene Don
Linguistic Auditing
Nigel Reeves & Colin Wright
Philosophy and Philosophers: An Introduction to Western Philosophy
John Shand
Design Patterns: Elements of Reusable Object-Oriented Software
Erich Gamma & Richard Helm & Ralph Johnson & John Vlissides
The importance of being earnest
Oscar Wilde