free price guide and tracking database| Title | Volume | Years | Issues |
|---|---|---|---|
| October Faction | 2014-2016 | 43 | |
| October Faction: Deadly Season | 2016-2017 | 11 | |
| October Faction: Open Season | 2019 | 1 | |
| October Faction: Supernatural Dreams | 2018 | 11 | |
| Off Road | 2011 | 1 | |
| Oliver Twist | 2009 | 1 | |
| Olympus Heights | 2004 | 6 | |
| One Small Voice | 2008 | 1 | |
| Onyx | Mini | 2015-2016 | 13 |
| Optimus Prime | 2016-2018 | 101 | |
| Optimus Prime: First Strike | One-Shot | 2017 | 3 |
| Opus: Complete Library Sunday Comics 2003-2008 | 2012 | 1 | |
| The Original Johnson | 2009 2011 |
2 | |
| Orphan Black | 2015 | 33 | |
| Orphan Black: Crazy Science | One-Shot | 2018 | 3 |
| Orphan Black: Deviations | 2017 | 19 | |
| Orphan Black: Helsinki | 2015-2016 | 17 | |
| The Other Dead | 2013 | 21 | |
| Our Expanding Universe | TPB | 2015 | 1 |
| Outland: Complete Library | 2012 | 1 |
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