The volume contributes to the ongoing nanoethics debate in four topical areas. The first part tackles questions of what could be called `meta-nanoethics'. Its focus lies on basic concepts and the issue of what - if anything - is truly novel and special about the new field of nanoethics or its subject matter. The second part of this volume presents a selection of interesting perspectives on some of the opportunities and challenges of nanotechnology. Part three takes a more in depth look at one of the most pressing current concerns: how to deal with the risks and uncertainties surrounding nanotechnology in a responsible manner. In its fourth and final part the volume touches on issues of public debate and policy.