American Grace: How Religion Divides and Unites Us, by David E. Campbell and Robert D. Putnam.
One little data point in the review caught my attention, though:
Half of all married Americans have spouses of a different faith.
That's something that demands unpacking, it seems to me. "Have" implies in the current day. Could that be really true? Or does it mean they married someone of another faith but don't necessarily practice both in the home? I'll definitely have to find that book.
And I'll bet Susan Katz Miller might have something very interesting to say about this...