Teacher's Petit Piaget
C. M. Charles
Quantum Questions: Mystical Writings of the World's Great Physicists
Kenneth E. Wilber
The International Encyclopedia of Ethics, 9 Volume Set
Hugh LaFollette
Transcendence and Mature Thought in Adulthood
Susanne R. Cook-Greuter & Melvin E. Miller
Gödel '96
Petr Hájek
Concise Introduction to Logic and Set Theory
Iqbal H. Jebril & Hemen Dutta & Ilwoo Cho