This book is an introduction to key issues in philosophical thought of Plato and Aristotle. Therefore it aims to provide prefatory orientation in their complex thought and addresses problems of dialogue, ontological hierarchy, metaphysics, knowledge and practical philosophy.

This book is an introduction to the main representatives of presocratic philosophical thought, namely Heraclitus, Parmenides, Empedocles, Anaxagoras, atomists and sophists. The author sketches main issues concerning problems of being, appearance, perception and mind.