| The unbearable wholeness of being: God, evolution, and the power of love I Delio Orbis Books, 2013 | 137 | 2013 |
| Christ in evolution I Delio Orbis Books, 2008 | 115 | 2008 |
| Simply Bonaventure 2nd. edition: An Introduction to His Life, Thought, and Writings I Delio New City Press, 2001 | 105 | 2001 |
| The emergent Christ: Exploring the meaning of Catholic in an evolutionary universe I Delio Orbis Books, 2011 | 82 | 2011 |
| Making all things new: catholicity, cosmology, consciousness I Delio Orbis Books, 2015 | 64 | 2015 |
| A Franciscan view of creation: Learning to live in a sacramental world I Delio, J Chinnici, E Saggau Franciscan Institute Publications, 2003 | 50 | 2003 |
| Care for creation: A Franciscan spirituality of the earth I Delio, KD Warner, P Wood Franciscan Media, 2020 | 49 | 2020 |
| From Teilhard to Omega: Co-creating and Unfinished Universe I Delio Orbis Books, 2014 | 42 | 2014 |
| Revisiting the Franciscan doctrine of Christ I Delio Theological Studies 64 (1), 3-23, 2003 | 42 | 2003 |
| Crucified Love: Bonaventure's Mysticism of the Crucified Christ I Delio Franciscan Media, 1998 | 41 | 1998 |
| Bonaventure's Metaphysics of the Good I Delio Theological Studies 60 (2), 228-246, 1999 | 40 | 1999 |
| Transhumanism or ultrahumanism? Teilhard de Chardin on technology, religion and evolution I Delio Theology and Science 10 (2), 153-166, 2012 | 33 | 2012 |
| From prophecy to mysticism: Bonaventure's eschatology in light of Joachim of Fiore I Delio Traditio 52, 153-177, 1997 | 26 | 1997 |
| Franciscan prayer I Delio Franciscan Media, 2022 | 25 | 2022 |
| Re-enchanting the earth: why AI needs religion I Delio Orbis Books, 2020 | 25 | 2020 |
| The humility of God: A Franciscan perspective I Delio Franciscan Media, 2024 | 24 | 2024 |
| Theology, metaphysics, and the centrality of christ I Delio Theological Studies 68 (2), 254-273, 2007 | 21 | 2007 |
| Brain science and the biology of belief: A theological response I Delio Zygon® 38 (3), 573-585, 2003 | 16 | 2003 |
| Clare of Assisi: A Heart Full of Love I Delio St. Anthony Messenger Press, 2007 | 14 | 2007 |
| Theology, spirituality and Christ the center: Bonaventure’s synthesis I Delio A Companion to Bonaventure, 359-402, 2014 | 12 | 2014 |
