- Abraham and the Secular
- Abraham, what happened
- Abrahamic Reflections on Randomness and Providence
- Address to the Greeks
- Afire with the Vision: Messages of Shoghi Effendi to Latin America
- African Politics and Ethics
- African Traditional Religion Encounters Christianity
- After Lives
- After Pluralism
- After Prophecy
- Agents of God
- Agir selon l'Evangile
- Ainsi Parlait Zarathoustra
- All the World an Icon
- American Religions and the Family
- American Religious Liberalism
- American Tricksters
- American Value Forever
- Amor de Jesus e Maria no Islão
- Amour, invincible amour
- An Analysis of Religious Belief
- An Atheist's Guide to Immortality
- An Experiment in Criticism
- An Open Letter to a Jehovah's Witness
- Analysis of Hinduism, Christianity, Buddhism & Jainism
- Ancient Divination and Experience
- Ancient Religions of the Austronesian World
- Angels All Around Us
- Answering Christianity And Judaism (Volume 1)
- Anthropological Perspectives on the Religious Uses of Mobile Apps
- Anti-Bible Theories Will Destroy Human Civilization - Proof
- Antropomorfismi lasten pelottelukulttuurissa
- Anti-Bible Theories Will Destroy Human Civilization - Proof
- Antropomorfismi lasten pelottelukulttuurissa
- Anunnaki para principiantes: el origen extraterrestre de la humanidad
- Anyone but Me
- Appel au monde
- APPLICATION DE L'AIMANT AU TRAITEMENT DES MALADIES
- Argonautica
- As Leis do Segredo
- As Leis do Sol
- Asian and Asian American Women in Theology and Religion
- Asian Philosophies and the Idea of Religion
- Asian Religious Responses to Darwinism
- Astrology and Religion among the Greeks and Romans
- Atheists Living in Today’s World. How to Live Free From the Weight of Religion
- Autobiography, Volume 2