Apologetics
- Christian Apologetics: A Lutheran Introduction by Nathan Greeley
- Confronting Christianity: 12 Hard Questions for the World’s Largest Religion by Rebecca McLaughlin
- Evidence that Demands a Verdict: Life-Changing Truth for a Skeptical World by Josh McDowell and Sean McDowell
- Handbook of Catholic Apologetics: Reasoned Answers to Questions of Faith by Peter Kreeft and Ronald Tacelli
- Handbook of Christian Apologetics: Hundreds of Answers to Crucial Questions by Peter Kreeft and Ronald Tacelli
- A History of Apologetics by Avery Dulles
- The History of Apologetics: A Biographical and Methodological Introduction edited by Forrest, Chatraw, and McGrath
- Imaginative Apologetics: Theology, Philosophy and the Catholic Tradition edited by Andrew Davison
- The New Apologetics: Defending the Faith in a Post-Christian Era edited by Matthew Nelson
- Reasonable Faith: Christian Truth and Apologetics by William Lane Craig
- When Skeptics Ask: A Handbook on Christian Evidences by Norman Geisler and Ronald Brooks
- Who Made God? And Answers to Over 100 Other Tough Questions of Faith edited by Ravi Zacharias and Norman Geisler
Bioethics
- Bioethics: A Primer for Christians by Gilbert Meilaender
- Christianity and Modern Medicine: Foundations for Bioethics by Mark W. Foreman and Lindsay Leonard
- Introduction to Jewish and Catholic Bioethics: A Comparative Analysis by Aaron L. Mackler
Ethics and Morality
- Ethics for Beginners: Big Ideas from 32 Great Minds by Peter Kreeft
- Morality: Restoring the Common Good in Divided Times by Jonathan Sacks
- Technology Ethics: Responsible Innovation and Design Strategies by Steven Umbrello
War and Violence
- A Basic Guide to the Just War Tradition: Christian Foundations and Practices by Eric Patterson
- Military Ethics: What Everyone Needs to Know by George Lucas
- Not in God’s Name: Confronting Religious Violence by Jonathan Sacks
- War and Peace: A Fulton Sheen Anthology edited by Al Smith
- War and Religion: A Very Short Introduction by Jolyon Mitchell and Joshua Rey
- War and the American Difference: Theological Reflections on Violence and National Identity by Stanley Hauerwas
- War, Peace, and Violence: Four Christian Views edited by Paul Copan