'Since happiness is an activity of the soul in accordance with perfect virtue, we must examine the nature of virtue'
The two reading groups scheduled for this autumn will carry on looking at ethical issues. The 15 October meeting will be based on reading Aristotle's Nichomachean Ethics (Books 1-4 and Book 10) - 'the most brilliant lecture notes ever written' (Alasdair MacIntyre).
A further meeting, scheduled for 19 November, will look at the concept of duty in Kant: suggested reading for that meeting and the lists for participation will be opened in October.
There are many translations of the Ethics, including many accessible versions free on line, as well as a huge literature.
A good starting point is the Stanford Encyclopedia of Philosophy, with entries by Richard Kraut on Aristotle's Ethics and Rosalind Hursthouse on Virtue Ethics. Richard Kraut's piece has an extensive bibliography. You can find them under https://leibniz.stanford.edu/friends/info/title_list/
Alasdair MacIntyre has a particular take, and offers context for Aristotle's thinking (After Virtue, Chaps. 10, 11, 12). Julia Annas questions the coherence of Aristotle's position and his centrality in 'virtue ethics' (The Morality of Happiness).