I would recommend this book to anyone who feels that they have experienced life on a profound level on occasion, but has a hard time alligning those deep wonderfully-personal feelings with an existing system of beliefs. Even if you haven't read the first four "With God" books, this one is more than worth your time, I promise. It's basic message is a very simple but profound one, and one that may be difficult for many people to easily agree with. The idea is that we are all God, that everything in existence is a facet of God, and that we are not actually separate from each other or from "God," but that are rather under the illusion that we are in order to have the relative experience of ourselves.
There can't be light if there is no dark. If an artist drew a beautiful soul-filling, awe-inspiring drawing in white ink, you couldn't see it if it were on white paper. That's why we need darkness in order to fully experience ourselves.
In this book, Neale Donald Walsch does a very good, concrete job of laying out the 10 illusions that he believes have caused humanity the most pain and trouble throughout our history. It all starts with the necessary, but danger illusion that we are separate from each other. Each of the other illusion builds off the previous one.
I was not raised in a religious household, but I have enough religious experiences of passionate living to believe in God. Even though I am not religious, I feel I came to these books with the skepticism of one that might feel these writings are blasphemous. But I'll have to say, that even though Walsch has a tendency to get too cute in his wording, his basic concepts are very sound, and that while I don't always believe in his style of presenting his ideas, I think the ideas themselve are very sound, and very ispiring.
It's hard not to agree that you should trust yourself and find your truth in yourself.