Have you read the book? I discovered its existence after learning a lot about analytic idealism, so I checked it on Wikipedia and the first principle of the book was stated as "The All is Mind; the Universe is Mental.".
I concluded that something might be going on here and idealism should probably be taken seriously as a world view, especially when I also encountered the following quote by Emerson: "What is popularly called Transcendentalism among us, is Idealism; Idealism as it appears in 1842".
So yeah all of this to ask whether "The Kybalion" is any good