De donde demonios salio el Eneagrama?

The author addresses her curiosity about the Enneagram—where does the knowledge come from? Who came up with it and when, and how trustworthy is this ancient instrument used to generate change in human lives and understand the universe? Many have researched its history, but none before Fernández Christlieb have conducted such a thorough study spanning from ancient civilizations to the 21st century.