| Author | Title | Publication Year | Index | Location | Format | Publisher |
|---|---|---|---|---|---|---|
| Harriet O'Brien | Queen Emma And The Viking | 2005 | 823 | HC11 | Hardcover | Bloomsbury USA |
| Kevin O'Donnell, Jr. | Caverns | 1982 | 1718 | PB7 | Paperback | Berkley |
| Kevin O'Donnell, Jr. | Cliffs | 1986 | 1715 | PB7 | Paperback | Berkley Books |
| Kevin O'Donnell, Jr. | Lava | 1982 | 1716 | PB7 | Paperback | Berkley Books |
| Kevin O'Donnell, Jr. | Mayflies | 1982 | 1714 | PB7 | Paperback | Berkley |
| Kevin O'Donnell, Jr. | ORA:CLE | 1984 | 1713 | PB7 | Paperback | Berkley Pub Group (Mm) |
| Kevin O'Donnell, Jr. | Reefs | 1981 | 1717 | PB7 | Paperback | Berkley Books |
| Chad Orzel | How To Teach Physics To Your Dog | 2009 | 1197 | Hardcover | Scribner |