Richard Holloway's book on ethics. The subtitle: Keeping Religion Out of Ethics. I'm looking forward to reading it, because it seems to mesh with the kind of enlightened moral law approach that our world desperately needs to affirm.
The concept of moral law is, of course, a Christian inheritance. The idea is that we all, deep down, affirm core common values, in principle if not in the working out of the finer detail, and that this knowledge has nothing to do with 'special revelation.' Following on from this is the necessity for all people of goodwill to be able to dialogue without special appeals to God, gods or Karl Barth.
God's views may be disputed, but Barth and Hauerwas would certainly disagree, and I suppose we'd all be disappointed if they didn't. Holloway is, himself, a former bishop of Edinburgh, so no slouch when it comes to confronting wooden-headed Reformed theology. Calvin apparently affirmed the existence of moral law, and it's only in the post-World War II years that a contrary view has gained traction, especially so among Reformed theologians. Catholics seem to have wisely ignored those developments, and it's good to see many Lutherans resisting the urge to descend down the rat-hole to oblivion that other Protestants have already bolted down.