Here is my list of summer holiday readings you might think that there somewhere in there is something you could find interesting.
Some reading on shareholder value from the people who practice what they preach.
Doing some research on how CSR policies and practice is influencing the role of the state.
Literature on trends in the world of sustainability
And some classics
Just want to add that the authors might not share my own opinions and beliefs on the positions that they are arguing. I think that any good researcher should know the field in which he or she is active and this also entails knowing the ‘other’ argument maybe even better than the position, which you are yourself have taken.