This was the main book I used for my Masters thesis. Harrison's research and thoroughness is quite incredible. Harrison studies the term charis and its cognates in their Graeco-Roman context. He identifies that the term charis is used in social, commercial and religious papyri dating from the 5th century BC and the 1st century which is important as St Paul’s letters are written in the mid to late 1st century. The term charis and its cognates are found in the social institution of benefactor/patron client relationships in the ancient world; whether they be in be household letters, commercial transactions or thankfulness to the gods. Moreover, he finds that charis can mean ‘gratefulness’ (from a client to their patron), ‘benefit’ (received from a patron/benefactor), ‘benefaction’, ‘favour’. It refers to concrete goods, whether from the gods or human benefactors/patrons rather than any kind of ‘spiritual’ goods or resources.
Unfortunately, ‘grace’ or charis has been theologised and spiritualised by the many theologians over 2000 years, which means that ‘grace’ has come to mean something that St Paul may never have intended it to mean. However, Paul uses the language of ‘grace’ to portray God as the great Benefactor to his Greaco-Roman audience, which would have been a familiar concept to them.
Having said all of this, it is an academic book and well out of the price range of many people. I only bought it because it was the main resource for my thesis. But it was well worth the $100 plus that I paid for it.