Hume's Epistemology and Metaphysics: An Introduction
Georges Dicker
A Socialist Meets Mr. Gurdjieff
Rowland Kenney
Morphology, Shape and Phylogeny
Norman MacLeod & Peter L. Forey
The Philosophy of Time
Robin le Poidevin & Murray MacBeath
The Integral Vision: A Very Short Introduction
Kenneth E. Wilber
Judgement and Reasoning in the Child
Jean Piaget