You can download the book from here. It has a zip archive which contains the book in pdf format and .mobi (for Kindle).
Opinions about the book
I’ve read the book, its well writen, pretty small, can be finished in about 2-3 hours of intense reading. It’s not boring, its quite straight to the point.
Has a few mindblowing parts that I’ve never heard Athene talking about.
If you want to support Athene, you can buy the book for about 12 dollars from Amazon. Look for it there.