PKD’s semi-autobiographical novel about a religious experience where a pink ray of light imparts the knowledge that his son has a life-threatening hernia, which doctors confirm and successfully operate on, saving the boy’s life. If that sounds like the far-out rambling of a man losing his mind, that’s because it is. Despite that, PKD puts together a surprisingly cohesive novel about rationalism, religion, and altered states of mind. I found the most interesting bits to be the exploration of early Christian texts.