| title | ISBN-13 | year of publica- tion | other author(s) |
|---|---|---|---|
| ACCA Study and Revision Pack: Regulatory Framework of Accounting Level 2. 8 | 978-0-273-02942-7 | 1988 | William O'Connor |
| Dracopedia: A Guide to Drawing the Dragons of the World | 978-1-60061-315-9 | 2009 | " |
| Dracopedia The Bestiary: An Artist's Guide to Creating Mythical Creatures | 978-1-4403-2524-3 | 2013 | " |
| Dracopedia The Great Dragons: An Artist's Field Guide and Drawing Journal | 978-1-4403-1067-6 | 2012 | " |
| Monstrous Compendium Annual, Vol. 3 | 978-0-7869-0449-5 | 1996 | Jon Pickens · Jeff Easley · Matt Adelsperger · William O'Connor · Arnie Swekel · Andrew Goldhawk · Tony Szczudlo · Tony DiTerlizzi |
| *OP Three Pillars | 978-1-56504-288-9 | 1997 | William O'Connor |
| Opus Dei: An Open Book | 978-0-85342-987-6 | 1991 | " |
| Sketch Dragons: A Draw-Inside Step-by-Step Sketchbook | 978-1-4403-1474-2 | 2011 | " |
Bill O'Connor · K. William O'Connor · **O.C.** · O'Connor · W.C. · W. Connor · William C. · William Connor · William E. O'Connor · William J. O'Connor · William O'Connor Morris
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