A History of Pagan Europe
Nigel Pennick & Prudence Jones
Child and Reality: Problems of Genetic Psychology
Jean Piaget
Webster's Dictionary and Thesaurus
Merriam-Webster, Inc
The Religious Life Today
Karl Rahner
The Theory of Money and Credit
Ludwig von Mises
Algorithms Illuminated (Part 3): Greedy Algorithms and Dynamic ...
Tim Roughgarden