“Epi” as a prefix usually means “beyond” or “above.” In this context, we believe it was Al’s intent to indicate that his reflections on ontology were advanced. He produced one xxx-page notebook on ontology and another xxx-page notebook epiontology (one of his neologisms) as well as 5 envelopes (xxx total pages) and 1 envelope on epiontology (xxx total pages. So his total production on the topic of ontology was a whopping xxxx pages.