Bass, Diana Butler. Christianity after Religion: The End of Church and the Birth of a New Spiritual Awakening. 1st ed. New York: HarperOne, 2012.
I heard Diana Butler Bass speak at the Festival of Homiletics a couple years ago, and she was fantastic. These are the notes I took from that presentation. It changed the way I look at the Creed, and has impacted how I teach Catechism.
I believe these notes essentially express the thrust of the above mentioned book. Another big take-away for me is the reversal of belonging. It used to be that–in order to belong to a church–a person went through this sequence: