Carl Jung and the I Ching.
Im a big fan of the I Ching, because like Carl Jung, Im kooky and smart.
I first read Jungs essay on the I Ching in high school, about 200 years ago. In it, he first introduced his concept of Synchronicity. The essay was the introduction to the translation of the I Ching by Richard Wilhelm. He called it the Book of Changes. You can find the full text here,