O
- Obsessed - Susan Andersen 1993 (Zebra)
- Odd Man Out
- # 1 - Sharron Cohen, 1987 (Harlequin Romance)
- # 2 - B.J. Daniels, 1995 (Intrigue)
- Of Cats And Kings - Beverly Sommers, 1987 (American)
- Of Water and Dragons - Kelley Heckart, 2005
- Officer And A Gentleman, An - Rachel Lee (1990)
- Official Duty - Doreen Roberts, 2004 (Intrigue)
- Oh Baby! - Lauryn Chandler, 1994
- Old Dreams, New Dreams - Jacqueline Diamond, 1991 (American)
- On A Wicked Dawn, Stephanie Laurens, 2002, Avon
- On A Wild Night, Stephanie Laurens, 2002, Avon
- On Eagle's Wings - Rebecca Goings, 2005
- On Executive Orders - Rianna Craig, 1986 (Intrigue)
- On The Edge - Kallysten, 2007 (Alinar Publishing)
- On The List - Patricia Rosemoor, 2004 (Intrigue)
- On The Naughty List - Jaycee Clark, Ellen Fisher, and Angelica Hart, 2005 (New Concepts Publishing)
- On The Run - Leigh Daniels, 1989 (Intrigue)
- On the Scent - M.J. Rodgers, 1994 (Intrigue)
- On The Way To A Wedding - Ingrid Weaver, 1996
- On The Way To The Wedding - Julia Quinn, 2006
- On Thin Ice - Susan Andersen 1995 (Zebra)
- On Wings Of Love - Laurel Pace, 1987 (American)
- Once A Thief, Michele Hauf, July 2005, Silhouette Bombshell #49
- Once And For Always - Stella Cameron (1988)
- Once Upon A Christmas
- # 1 - Anna Adams, Melinda Curtis and Brenda Novak 2006 (Harlequin Superromance # 1380)
- # 2 - Lisa Plumley, 2005 (Zebra)
- Once Upon A Rose - Judith O'Brien, 1996
- Once Upon A Time - Rebecca Flanders, 1992 (American)
- One And Only - Barbara Bretton, 1993 (Berkley)
- One Chance At Love - Carole Mortimer, 1988 (Presents)
- One Degree of Separation - Fiona Glass, 2005
- One Foot In Heaven - Laraine McDaniel, 1993 (American)
- One Good Knight - Mercedes Lackey, 2007 (Luna)
- One Hot Summer - Eve Asbury Whiskey creek press 2006
- One Little Sin - Liz Carlyle, 2005
- One Man's Folly - Cathy Gillen Thacker, 1989 (American)
- One More Valentine - Anne Stuart, 1993 (American)
- One Reckless Night - Sara Craven, 1998 (Presents)
- One Step Ahead
- One Summer
- # 1 - Nora Roberts, 1986
- # 2 - Karen Robards 1993
- One Tough Texan - M.J. Rodgers, 1997 (Intrigue)
- One Wild Rose - Geri Borcz, 2002, (Zebra Historical)
- One-Woman Man, A
- # 1 - M.L. Gamble, 1998 (Intrigue)
- Only A Memory Away - Madeline St. Claire, 1998 (Intrigue)
- Only By Your Touch - Stella Cameron (1992)
- Only in Your Arms - Lisa Kleypas (1995)
- Only Love - Elizabeth Lowell, 1995
- Only Man To Trust, The - Grace Green, 1998 (Intrigue)
- Only Skin Deep - Rebecca York, 1992 (Intrigue)
- Only With A Highlander - Janet Chapman, 2005
- Only With Your Love - Lisa Kleypas (1992)
- Only Witness, The - Jan Michaels, 1987 (Intrigue)
- Opal Fire - Sandy Dengler, 1986
- Opal Fires - Lynda Trent, 1982
- Operation Bassinet - Joyce Sullivan, 2003 (Intrigue)
- Operation: Midnight Cowboy - Linda Castillo, 2007 (Intrigue)
- Operation: Midnight Guardian - Linda Castillo, 2006 (Intrigue)
- Operation S.N.A.R.E. - Eve Gladstone, 1987 (Intrigue)
- Opposites Attract
- # 1 -Nora Roberts, 1984
- # 2 - Karen Pershing, 1986 (American)
- # 3 -Michelle M Pillow - 2006 (Virgin Publishing)
- Orchid Hunter, The, Sandra K. Moore, March 2005, Silhouette Bombshell #35
- Origin In Death - J.D. Robb (2005)
- Orphan, The - Stella Cameron (2002)
- Other Half, The - Jayelle Drewry, 2005
- Other Laura, The - Sheryl Lynn, 1996 (Intrigue)
- Other Woman, The:
- #1 - Jessica Steele, 1980 (Harlequin Romance #2370)
- #2 - Candace Schuler, 1993 (Harlequin Temptation #451)
- #3 - Brenda Novak, 2006, (Harlequin Superromance #1344)
- Otherwise Engaged - Suzanne Brockmann, 1997 (Bantam Loveswept)
- Our Husband, Stephanie Bond, 2000, St. Martin's Press
- Out From The Shadows - Andrea Davidson, 1986 (Intrigue)
- Out Of Control
- #1 - Charlotte Lamb, 1988 (Presents)
- #2 - Candace Schuler, 1997, (Harlequin Temptation, #648)
- #3 - Suzanne Brockmann, 2002, (Ballantine)
- #4 - Janice Macdonald, 2006, (Harlequin Superromance # 1378)
- Out Of Nowhere - Rebecca York, 2003 (Intrigue)
- Out Of The Blue - Alaina Hawthorne, 1989
- Out of the Box - Kallysten, 2007 (Alinar Publishing)
- Out of the Box 2 - Kallysten, 2007 (Alinar Publishing)
- Outcast, The - Jayelle Drewry, 2006
- Outlander - Diana Gabaldon, 1991
- Outlaw
- 1 - Elizabeth Lowell, 1994, (MIRA)
- 2 - Lisa Plumley, 1999, (Zebra Splendor)
- Outlawed! - B.J. Daniels, 1996 (Intrigue)
- Outrageous - Lori Foster - April 1997 Harlequin Temptation
- Outside In - Beverly Sommers, 1990 (American)
- Outsider's Redemption, The - Joanna Wayne, 2000 (Intrigue)
- Over The Edge - Suzanne Brockmann, 2001 (Ivy)
- Over the Moon - MaryJanice Davidson, 2007 (Berkley)
- The Overlord's Bride - Margaret Moore, 2001 (Harlequin Historical)
