Russ Shafer-Landau 
Oxford Studies in Metaethics 13 [PDF ebook] 

Oxford Studies in Metaethics is the only publication devoted exclusively to original philosophical work in the foundations of ethics. It provides an annual selection of much of the best new scholarship being done in the field. Its broad purview includes work being done at the intersections of ethical theory with metaphysics, epistemology, philosophy of language, and philosophy of mind. The essays included in the series provide an excellent basis forunderstanding recent developments in the field; those who would like to acquaint themselves with the current state of play in metaethics would do well to start here.