The general query
"So, this 'language' that is in the Homeric epics... What kind of language is it?"
It's higher, visual language of inner development. It's a deep language that once you have it in you you are able to see things in yourself and in the world around you that you weren't able to see prior. You needed the language to see it.
"Where can I read about this? What books have been written about it?"
The mainstream doesn't know about it. Academia is mainstream. Academia can't see it.
"Yet you claim to know about it. Where did you learn it?"
Not from a book.
"So why don't you write a book on it?"
Mystics don't write books.