Standard
Deviation | Rating | Title |
| 1.369 | 3.18 | The Science of God by Gerald L. Schroeder |
| 1.275 | 3.88 | Mother Theresa: Come Be My Light - the private writings of the saint of Calcutta by Mother Teresa |
| 1.254 | 4.21 | The Idea of a University by John Henry Newman |
| 1.238 | 3.97 | The Holy Bible: New American Bible, 2nd Edition by New American Bible |
| 1.217 | 3.84 | Who Needs God by Harold Kushner |
| 1.216 | 3.89 | Conversations with God: an Uncommon Dialogue by Neale Donald Walsch |
| 1.192 | 3.78 | On Being a Christian by Hans Küng |
| 1.181 | 3.64 | A Letter Concerning Toleration: Humbly Submitted by John Locke |
| 1.178 | 3.53 | The Da Vinci Code by Dan Brown |
| 1.172 | 3.19 | Jesus and Yahweh: The Names Divine by Harold Bloom |
| 1.165 | 3.52 | Memnoch the Devil by Anne Rice |
| 1.165 | 3.49 | The Different Drum: Community Making and Peace by M. Scott Peck |
| 1.16 | 3.91 | The Art of Pilgrimage: The Seeker's Guide to Making Travel Sacred by Phil Cousineau |
| 1.16 | 3.36 | On Religion: Speeches to its Cultured Despisers by Friedrich Schleiermacher |
| 1.159 | 3.38 | Beyond Freedom & Dignity by B. F. Skinner |
| 1.153 | 3.5 | Father Joe by Tony Hendra |
| 1.15 | 3.4 | A Book of Angels by Sophy Burnham |
| 1.142 | 3.83 | Triumph: The Power and the Glory of the Catholic Church: A 2,000-Year History by H. W. Crocker III |
| 1.132 | 4.21 | Catechism of the Catholic Church by Catholic Church |
| 1.129 | 3.74 | Al-Qur'an: A Contemporary Translation (Ahmed Ali, 1984) by Ahmed Ali |
| 1.107 | 3.93 | Dynamics of Faith by Paul Tillich |
| 1.106 | 3.81 | Becoming Human by Jean Vanier |
| 1.105 | 3.71 | In the Beginning: A New Interpretation of Genesis by Karen Armstrong |
| 1.103 | 3.55 | The Septuagint with Apocrypha: Greek and English by L. C. L. Brenton |
| 1.102 | 3.62 | The Book Nobody Read: Chasing the Revolutions of Nicolaus Copernicus by Owen Gingerich |
| 1.102 | 3.46 | Christ the Lord: Out of Egypt by Anne Rice |
| 1.101 | 3.46 | The Maytrees by Annie Dillard |
| 1.092 | 3.92 | Simple Abundance: A Daybook of Comfort and Joy by Sarah Ban Breathnach |
| 1.091 | 3.37 | The Pilgrimage: A Contemporary Quest for Ancient Wisdom by Paulo Coelho |
| 1.086 | 3.45 | Killing the Buddha: A Heretic's Bible by Peter Manseau |
| 1.083 | 3.58 | The Penguin Dictionary of Saints by Donald Attwater |
| 1.08 | 4.18 | The Catholic Study Bible, First Edition: New American Bible by Donald Senior |
| 1.077 | 3.76 | The Courage to Create by Rollo May |
| 1.063 | 3.72 | In a Different Voice: Psychological Theory and Women's Development by Carol Gilligan |
| 1.06 | 3.85 | Tuesdays with Morrie: An Old Man, a Young Man, and Life's Greatest Lesson by Mitch Albom |
| 1.059 | 3.61 | Mary, Called Magdalene by Margaret George |
| 1.056 | 4.08 | The Courage to Heal - Third Edition - Revised and Expanded: A Guide for Women Survivors of Child Sexual Abuse by Ellen Bass |
| 1.055 | 3.49 | Rocks of Ages: Science and Religion in the Fullness of Life by Stephen Jay Gould |
| 1.052 | 3.93 | Confessions by Saint Augustine |
| 1.05 | 3.65 | Being and Nothingness by Jean-Paul Sartre |
| 1.048 | 3.92 | A Theology of Liberation: History, Politics, and Salvation by Gustavo Gutierrez |
| 1.048 | 3.63 | People of the Lie: The Hope for Healing Human Evil by M. Scott Peck |
| 1.045 | 3.92 | The Last Battle by C. S. Lewis |
| 1.042 | 3.71 | The Tao of Physics by Fritjof Capra |
| 1.039 | 3.83 | The Diary of a Country Priest by Georges Bernanos |
| 1.031 | 3.56 | Discourse on Method / Meditations on First Philosophy by René Descartes |
| 1.03 | 3.3 | Pooh and the Philosophers : In Which It Is Shown That All of Western Philosophy Is Merely a Preamble to Winnie-The-Pooh by John Tyerman Williams |
| 1.029 | 3.9 | A Simple Path by Mother Teresa |
| 1.026 | 4.05 | Earth Prayers From around the World: 365 Prayers, Poems, and Invocations for Honoring the Earth by Elizabeth Roberts |
| 1.025 | 3.94 | New Bible Commentary: 21st Century Edition by D. A. Carson |
| 1.023 | 3.95 | Jesus Through the Centuries: His Place in the History of Culture by Jaroslav Pelikan |
| 1.021 | 3.82 | God and Man at Yale by William F. Buckley, Jr. |
| 1.02 | 3.89 | The case for God by Karen Armstrong |
| 1.019 | 3.72 | The Ornament of the World: How Muslims, Jews and Christians Created a Culture of Tolerance in Medieval Spain by Maria Rosa Menocal |
| 1.012 | 3.94 | The Five Love Languages by Gary Chapman |
| 1.011 | 3.48 | Papal Sin: Structures of Deceit by Garry Wills |
| 1.01 | 3.83 | The Year of Magical Thinking by Joan Didion |
| 1.009 | 3.85 | Care of the Soul : A Guide for Cultivating Depth and Sacredness in Everyday Life by Thomas Moore |
| 1.008 | 4.04 | Anatomy of the Spirit: The Seven Stages of Power and Healing by Caroline Myss |
| 1.007 | 4.02 | Open Mind, Open Heart: The Contemplative Dimension of the Gospel by Thomas Keating |
| 1.007 | 4 | To Have or to Be? by Erich Fromm |
| 1.004 | 4.04 | The Cloud of Unknowing by Cloud of Unknowing author |
| 1.002 | 3.96 | Personality Types: Using the Enneagram for Self-Discovery by Don Richard Riso |
| 1.002 | 3.41 | The Crisis of Islam: Holy War and Unholy Terror by Bernard Lewis |
| 1.001 | 3.8 | The Book of Virtues by William J. Bennett |
| 0.999 | 3.61 | The Dead Sea Scrolls in English by Géza Vermes |
| 0.992 | 3.86 | Beowulf by Anonymous |
| 0.989 | 4.05 | The Courage to Be by Paul Tillich |
| 0.981 | 3.73 | How the Irish Saved Civilization by Thomas Cahill |
| 0.981 | 3.98 | Crossing the Threshold of Hope by Pope John Paul II |
| 0.977 | 3.98 | Saint Thomas Aquinas: The Dumb Ox by G. K. Chesterton |
| 0.976 | 4.22 | The Treasury of David by C. H. Spurgeon |
| 0.974 | 3.79 | The Tao of Pooh by Benjamin Hoff |
| 0.971 | 3.82 | Love, Medicine and Miracles by Bernie S. Siegel |
| 0.97 | 3.71 | The Prince by Niccolò Machiavelli |
| 0.969 | 3.9 | The Road Less Traveled by M. Scott Peck |
| 0.968 | 3.52 | Circling My Mother: A Memoir by Mary Gordon |
| 0.968 | 3.96 | A Man for All Seasons by Robert Bolt |
| 0.967 | 3.48 | The Ancient Near East, Volume 1: An Anthology of Texts and Pictures by James B. Pritchard |
| 0.964 | 3.75 | Rule of Saint Benedict by Saint Benedict |
| 0.964 | 4.07 | Love and Will by Rollo May |
| 0.964 | 3.57 | Final Payments by Mary Gordon |
| 0.959 | 4.01 | The Seven Storey Mountain by Thomas Merton |
| 0.959 | 4.04 | The Cloister Walk by Kathleen Norris |
| 0.958 | 3.69 | Generation X: Tales for an Accelerated Culture by Douglas Coupland |
| 0.957 | 3.79 | The Real Jesus by Luke Timothy Johnson |
| 0.956 | 3.8 | The Language of God: A Scientist Presents Evidence for Belief by Francis S. Collins |
| 0.955 | 3.44 | Called Out of Darkness: A Spiritual Confession by Anne Rice |
| 0.951 | 4.08 | The Imitation of Christ by Thomas à Kempis |
| 0.949 | 3.68 | The Pilgrim's Regress: An Allegorical Apology for Christianity Reason and Romanticism by C. S. Lewis |
| 0.949 | 3.83 | C. S. Lewis' Letters to Children by C. S. Lewis |
| 0.944 | 3.65 | Galileo’s Daughter: A Historical Memoir of Science, Faith, and Love by Dava Sobel |
| 0.94 | 4.05 | Gandhi An Autobiography: The Story of My Experiments With Truth by Mohandas Karamchand (Mahatma) Gandhi |
| 0.94 | 4.14 | Heretics by Gilbert Keith Chesterton |
| 0.939 | 4.26 | The Reason for God: Belief in an Age of Skepticism by Timothy Keller |
| 0.935 | 3.77 | The Analects by Confucius |
| 0.935 | 3.83 | What Jesus Meant by Garry Wills |
| 0.935 | 3.89 | Mythology by Edith Hamilton |
| 0.934 | 3.91 | The Silver Chair by C. S. Lewis |
| 0.934 | 3.72 | The Age of the Cathedrals: Art and Society, 980-1420 by Georges Duby |
