| Bare Alley Ink |
O'Connor, Doris |
| The Cleaners |
O'Connor, Doris |
| Club Ink |
O'Connor, Doris |
| Dating Games |
O'Connor, Doris |
| The Dragons of Skye |
O'Connor, Doris |
| The Giovanni Clan |
O'Connor, Doris |
| Lure |
O'Connor, Doris |
| McLeod Security |
O'Connor, Doris |
| Premiere Companions |
O'Connor, Doris |
| The Projects |
O'Connor, Doris |
| The Protectors |
O'Connor, Doris |
| Services to Sisterhood |
O'Connor, Doris |
| The Spectrum Auctions |
O'Connor, Doris |
| The Vampire Games |
O'Connor, Doris |
| Vikings Through Time |
O'Connor, Doris |
| The Warriors |
O'Connor, Doris |
| The Thin Green Line |
O'Dare, Deirdre |
| The Wild Bunch |
O'Dare, Deirdre |
| Hearts of Heroes |
O'Gara, Rayne |
| The Landcaster Brothers |
O'Gara, Rayne |
| Blue-Eyed Four |
O'Malley, Tierney |
| Knight Brothers |
O'Malley, Tierney |
| Aidan Undercover |
O'Quinn, Erin |
| A Burns! Mystery |
O'Quinn, Erin |
| The Dawn of Ireland |
O'Quinn, Erin |
| A Gaslight Mystery |
O'Quinn, Erin |
| The Iron Warrior |
O'Quinn, Erin |
| Nevada Highlander |
O'Quinn, Erin |
| Noble Dimensions |
O'Quinn, Erin |
| The Renegade and the Runaway |
O'Quinn, Erin |
| The Twilight of Magic |
O'Quinn, Erin |
| David and Andrew |
O'Reilly, Terry |
| Colours |
Obayani, Kambon |
| Plantain |
Oliver, Amelia |
| Seoul Mate |
Oliver, Amelia |
| Blood Wine |
Olivia, R.M. |
| My Harem Academia |
Olsen, Xya |
| Siring an Heir |
Olsen, Xya |
| Desire |
Olson, Jodi |
| The Alpha's Pleasure |
Otto, Jay |
| The Rekindled Trilogy |
Otto, Jay |
| Deviations |
Owen, Chris; Payne, Jodi |
| An If Only... Novel |
Owens, Lisa M. |
| Love's Value |
Owens, Lisa M. |
| More Than a Marine |
Owens, Lisa M. |