Selected Readings:
Budziszewski, J. Written on the Heart: The Case for Natural Law. Downers Grove. IL: InterVarsity Press, 1997.
Jones, D. C. Biblical Christian Ethics. Grand Rapids, MI: Baker Books, 1994.
* Rae, S. B. Moral Choices: An Introduction to Ethics (Third Edition). Grand Rapids, MI: Zondervan, 1995, 2000, 2009.
A very good textbook that covers ethical systems, Christian ethics (its own version) and ways of moral reasoning. A very useful introduction, which covers foundational ethical and theological issues before providing important applied problems to work through.
Wilkens, S. Beyond Bumper Sticker Ethics: An Introduction to Theories of Right and Wrong. Downers Grove, IL: InterVarsity Press, 1995