*YOU CAN ONLY FIND IT IN PALAIOVIVLIOTHIKI-KARAMOUZAS
*Title: Lessons Of Ontology And Metaphysics
*Author: N. I. Bousoulas
*In metaphysics, ontology is the philosophical study of being, as well as related concepts such as existence, becoming, and reality. Ontology addresses questions of how entities are grouped into categories and which of these entities exist on the most fundamental level.