Joined-Up Life by Andrew Cameron.
Andrew taught ethics at Moore Theological College (Reformed Anglican college in Sydney) when I was there. The book develops his approach to ethics, where he draws on a number of 'poles' in Scripture (Doctrine of God/Creation/Eschatology/Gospel/Ecclesiology/Law) and 'joins them up' to chart a course for Christian ethics. The second part of the book is the application of his approach to a number of scenarios.
As a Christian, I find his approach compelling (as in, I think it fits the Bible's approach to ethics) and useful.