| Title | Author | Status | Proofcount | Priority |
|---|---|---|---|---|
| Grace and Personality | Oman, John (1860-1939) | Wanted | 0 | 1 |
| Food for the Lambs; or, Helps for Young Christians | Orr, James (1844-1913) | Have ThML | 0 | 1 |
| How to Live a Holy Life | Orr, James (1844-1913) | Have ThML | 0 | 1 |
| The Idea of the Holy | Otto, Rudolph (1869-1937) | Wanted | 0 | 1 |
| Display of Arminianism | Owen, John (1616-1683) | Have ThML | 0 | 1 |
| Inquiry into the Original, Nature, Institution, Power, Order, and Communion of Evangelical Churches | Owen, John (1616-1683) | Have ThML | 0 | 1 |
| Vindiciæ Evangelicæ or, the Mystery of the Gospel Vindicated and Socinianism Examined | Owen, John (1616-1683) | Have ThML | 0 | 1 |
| Discourse Concerning Liturgies, and their Imposition | Owen, John (1616-1683) | Have ThML | 1 | 1 |
| Poema | Owen, John (1616-1683) | Have ThML | 1 | 1 |
| Review of the Annotations of Hugo Grotius | Owen, John (1616-1683) | Have ThML | 1 | 1 |