Nicholas Rescher 
Studies in Value Theory [PDF ebook] 

Since the late 1960’s Professor Rescher has carried on a series of investigations in value theory in an endeavor to clarify the nature of values and the ways in which they impact on human affairs.
This book collects together some dozen of these studies in a way that showcases the author’s characteristic perspective on this important range of basic philosophy issues. It bring clearly to view the author’s characteristic combinations of analytical accuracies within a broad luminative outlook.