Reddit reviews Bhagavad-gita As It Is

I'd recommend reading the Bhagavad Gita, maybe start with a modern translation to familiarize yourself with the contents before diving into a more literal translation. I don't really have anything on tap for Buddhist or Shinto literature. Usually I start with the history of the religion and follow-up with any mentioned texts.

It's said that the are 8 mystical powers

You can try and start the Mystic Yoga path reading Bhagavad-Gita