This is not a book for someone who's "comfortable" with their traditional understanding of church, God, Jesus and Christianity. Don't bother reading it - you'll just get angry.
For those of us who are NOT "comfortable" with the traditional understandings of these things this is an amazing book. For those of us who are still active in church it is challenging, even to those who might consider themselves liberal or progressive (as I do).
Vosper builds on the work of recent scholars and theologians such as Spong, Borg, Crossan, and Geering, to boldly state not only what most liberal Christians believe/doubt (God is not a being, there is no heaven or hell, the Bible is not inerrant - it has good, bad and ugly bits, Jesus was not God, Jesus was not a blood sacrifice to wash away sin, etc...) but to challenge us to envision what a "faith" could look like once it jettisons all the "unnecessary" dogmatic and institutional baggage we've accumulated on our 2,000 year journey.
Some of this "baggage" is as comforting as Linus' "security blanket" and will be just as hard for some people to live without! Can we no longer pray and expect God to respond? Can we no longer expect to go to heaven and see our dog Fluffy and all our loved ones? Can we no longer assume that we are the "one true" religion? Isn't Jesus the saviour of the world??
Vosper's great insight, in my opinion, which is perhaps not original to her, but she expounds the principle well, is that things like love, relationship, compassion, justice, and community have intrinsic value of their own - they don't need divine sanction to have worth. A group of humanists, working to provide better access to government services for a disadvantaged group is doing sacred work according to Vosper. God IS compassion, not some gray-bearded man in the sky.
Vosper goes way beyond where I thought progressive Christianity could go in my lifetime, but that's what separates the prophets from the rest of us.
This book is recommended for anyone who still holds out hope for the human community and our ability to work together "faithfully" holding to shared respect for common values such as dignity, justice and integrity. When the Christian church becomes such a community the "heaven on earth" world envisioned by Jesus will be a step closer to reality.