I am not familiar with the book or the author, but reading the blurb on Amazon makes it sound like a self-help book about being all you can be, and not seeing it as the revelation of God and a manifesto of the new Kingdom as Jesus intended it to be. Fox seems to think it's about "Develop a completely integrated and fully expressed personality" instead of "Conform your life to the principles of God's kingdom." He treats it like good psychology instead of Jesus talking about the kingdom of God. But I haven't read it, and only read that small review, so you have to take my comments with a grain of salt.