Indeed. I would read that book, except reading the explanation of the cover alone brought back horrible memories of the time I tried reading all the way through a book on "color therapy" in an attempt to critically analyze it. I got halfway through before realizing that all the scientific claims had already been made in the forward and the rest of the book was just going to be feel good quips and empty noise symbolizing nothing. It's hard to criticize the majority of what the book says when the majority of it is just poetry.
As for the specific chapters, I only read a little of the first chapter so far, though it is interesting in that it reveals how you interpret dreams and the fact that you did not have the most fortunate life. However, to be cold and analytical about this, I'm afraid it doesn't reveal anything as to why this spirit world somehow manages to explain conciousness or make it "better" than if it was just in the brain. We still feel what we feel, and what you describe is just a different set of unknown physics that generates the experience. Again, what if we actually were in this spirit realm? Is this realm "purpose incarnate", the physical manifestation of meaning? And if it is, so what? In the end, you have to justify your own existance for yourself. I can see no way for that realm to somehow justify our existance or make our conciousness "more real" than if it was just our minds.
If you want meaning and purpose, you can find it yourself. There is no need to go this convoluted route which, even if true, would need it's own justification for being what it is.
Edit: What does love of good and love of evil have to do with their argument? They are saying it seems selfish to do things only for yourself, which by the way is the very definition of selfish. I will add that if one really wants to help themself it is in their best interest to aid others when they need it. I will also add that I too think it is important that someone enjoy their work.
However, you go as far as to say that if someone aids others even if they would rather not, that is evil because they are not working to feed their desires.