C. O'Brien · Cormac OBrien · O'Brien
| title | ISBN-13 | year of publica- tion |
|---|---|---|
| Secret Lives of the Civil War: What Your Teachers Never Told You About the War Between the States | 978-1-59474-138-8 | 2007 |
| Secret Lives of the First Ladies: What Your Teachers Never Told You About the Women of the White House | 978-1-59474-014-5 | 2005 |
| Secret Lives of the U.S. Presidents | 978-1-931686-57-0 | 2004 |
| Secret Lives of the U.S. Presidents: Trivia Card Game | 978-1-931686-59-4 | 2004 |
| Secret Lives of the U.S. Presidents: What Your Teachers Never Told You About the Men of the White House | 978-1-59474-344-3 | 2009 |
| Secret Lives of the U.S. Presidents: What Your Teachers Never Told You about the Men of the White House | 978-1-931686-58-7 | 2003 |