Free of both hippy platitudes and creepy cultish pyramid schemes, the path to spiritual development on the path of Love is one of balance, integration of experience, and the uptake of personal/communal responsibility. Fans of Jordan Peterson will find a resonant message. The beginning reads like an awkward Kardec-spritist sci-fi novel (think History channel crazy hair “aliens” meme). New readers should treat the text like fiction at first, and consider the factual nature of the text later, in order to consider the moral messages.
Edit: Christians will also find a resonant message, as the cosmology elevates the teachings of Jesus. Although, not everything is roses. As in Dante, hell is a place of our own making.
All you need is the Bible. Anything else slides into Satan's games.