I've seen Muaresku on a few podcasts -- yes, this book is supposed to be excellent.

Se7enZ

BooksAndArticles

Book Report: A History of Religious Ideas Vol. 1 by Mircea Eliade - Ch 10-12

Great work! 

If anybody is looking for more on the Eleusinian mysteries, I recommend a) reading the Homeric Hymn to Demeter ([link](https://chs.harvard.edu/primary-source/homeric-hymn-to-demeter-sb/) ) and b) checking out Muraresku's "The Immortality Key" ([link](https://www.brianmuraresku.com/the-immortality-key)) which investigates the Mysteries and rites of Demeter in depth--clickbaity title but the book is excellent. 