This volume consists in part of papers given at a conference held at the University of Pretoria in September 2011, and in part of specially commissioned essays. The theme of sensitivity to outsiders is conceived as a way of exploring the relationship between mission and ethics in the New Testament and early Christianity. As ever in collective volumes, especially large ones, it is not always easy to discern a clear thread which unites all the essays. The editors, who do provide an introductory essay, could perhaps have made clearer than they do the different concepts of both mission and ethics, as well as their connection, which operate in the different essays. Some are more taken up with what one might term attitudes to outsiders per se, with the issue of ethics barely entering in. Others are concerned with the character of the change brought about by becoming a Christian and so, inevitably, with questions of identity, always conceived as a dynamic and fluid concept. Some show a strong interest in attitudes to perceived enemies within rather than those straightforwardly outside the community. Almost three-quarters of the volume concerns itself with the Old and New Testaments, in particular the letters of Paul. Of the essays directly relevant to this Journal, Chris L. de Wet examines what he terms ‘missionality’, religious identity and power in 1 Clement, concentrating on the various strategies that the author deploys to regain the following of those in Corinth, adopting a broadly negative opinion of them. The same author examines 2 Clement as ‘missional performance’, arguing that the letter is searching for the legitimacy and validity of Christianity not against Greco-Roman religions, but as a Greco-Roman religion. Jonathan Draper contributes a piece on the Didache concentrating on the author's presentation of those he is addressing as a ‘holiness community’. Tobias Nicklas looks at Diognetus as a document which elucidates the complex subject of the Christian construction of ‘others’, in this case pagans and Jews. While Nicklas is clear that the presentation of the latter in Diognetus is ‘constructed’, he also notes how it comports with known opinions amongst the educated pagans who are his audience. Paul Foster highlights Ignatius' interest in the need for Christians to behave in a way which takes account of outsiders' reactions, betraying an openness to outsiders which might not be thought compatible with the generally polemical nature of his seven epistles. Candida Moss writes a nuanced piece on the Acts of the Martyrs, showing how they betray a range of attitudes to outsiders, seen both in the hostile attitude taken to Christian persecutors and in the fact that these stories can show how martyrs' deaths contribute to the conversion of non-Christians. Skipping the centuries somewhat, Chris L. De Wet examines John Chrysostom's efforts to convert Goths in Constantinople to a non-Arian position, seeing to what extent his engagement with this group betrays stereotypical views of ‘barbarians’. A final section of the volume examines ways in which some of the issues raised have implications for contemporary Christian practice.