This is literally one of the worst books I have ever read, and I have no idea why I read it to the end other than that it came recommended by people I trust(ed) (to be clear, I no longer trust those people).
The story itself is embarrassingly badly written. I totally understand why no publisher picked this up until the author shifted 100,000 copies he had published himself.
The spirituality is totally inane and shallow, I can only think that if you are moved by this book you have never engaged in any kind of spiritual practice yourself. It is a collection of ideas picked up from other sources and clumsily stuck together in ways that don't even make sense. And worst of all, it is all then mapped onto Christianity. Not, as it seems at first it might be, as a challenge to that religion, but as a proposed salvation of pure Christianity.
It is sexist and racist in ways that would have been shocking even back in the 90s when it was published.
Don't read this. Go practice some yoga and get Chat GPT to summarize the important aspects of the main religions for you. The spiritual outcomes of this would be much deeper than reading this stupid book.