A decade of research on the ethics of human enhancement has produced a vast literature. This collection is an excellent contribution to the field; it fulfills and exceeds the promises of its two subsections: understanding and advancing the debate. Section 1, Understanding the Debate includes eight papers and section 2 Advancing the Debate includes seven. The collection also contains a concise introductory essay by Alberto Giubilini and Sagar Sanyal, providing a helpful overview of recent developments in the literature. It is a pleasure to read and is appropriate to use in post-graduate courses and advanced undergraduate seminars.