Jonathan Harrison 
Our Knowledge of Right and Wrong [PDF ebook] 

First published in 2002. This is Volume VI of twelve in the Library of Philosophy series on Ethics. Written in 1971, this text looks at our knowledge of right and wrong and looks at topics of whether our knowledge of morality is a delusion and asks questions around moral judgment and they are subjective, the Universalization principle of a moral sense, God”s commandments and human duties and finishes with suggestions of other reasons for actions.