Wings in the Night
1. Twilight Phantasies (1993)
2. Twilight Memories (1994)
3. Twilight Illusions (1994)
4. Strangers In The Night (omnibus) (1995) (with Anne Stuart and Chelsea Quinn Yarbro)
5. Born in Twilight (1997)
6. Brides of the Night (omnibus) (1998) (with Marilyn Tracy)
7. Twilight Hunger (2002)
8. Embrace the Twilight (2003)
9. Two by Twilight: Twilight Vows / Run from Twilight (omnibus) (2003)
10. Edge of Twilight (2004)
11. Blue Twilight (2005)
12. Prince of Twilight (2006)
13. Demon's Kiss (2007)
14. Lover's Bite (2008)
15. Angel's Pain (2008)
16. Bloodline (2009)
17. Twilight Prophecy (2011)
18. Twilight Fulfilled (2011)
Wings in the Night (omnibus) (2001)
At Twilight (omnibus) (2002)
Twilight Begins (omnibus) (2004)
The Twilight Shadows Bundle (2006)
Wings in the Night Part 1 (omnibus) (2007)
Wings in the Night Part 2 (omnibus) (2007)

Fairies of Shara
1. Fairytale (1996)
2. Forever Enchanted (1997)
The Fairy Collection Boxed Set (omnibus) (2012)
The Fairy's Wish (2012)

Texas Brands
1. The Littlest Cowboy (1996)
2. The Baddest Virgin in Texas (1997)
3. Badlands Bad Boy (1997)
4. The Husband She Couldn't Remember (1998)
5. That Mysterious Texas Brand Man (1998)
6. The Baddest Bride in Texas (1999)
7. The Outlaw Bride (1999)
8. Angel Meets the Badman (2000)
9. The Homecoming (2001)
The Texas Brand: In the Beginning (omnibus) (2002)

Eternity
1. Eternity (1998)
2. Infinity (1999)
3. Destiny (2001)

Oklahoma All-Girl Brands
1. The Brands Who Came for Christmas (2000)
2. Brand-new Heartache (2001)
3. Secrets and Lies (2002)
4. Feels Like Home (2005)
5. Dangerous Lover (2006)

Mordecai Young
1. Thicker Than Water (2003)
2. Colder Than Ice (2004)
3. Darker Than Midnight (2005)

Lords of the Underworld (with Susan Krinard and Gena Showalter)
Heart of Darkness: The Darkest Angel / Love Me to Death / Lady of the Nile (2009)

Secrets of Shadow Falls
1. Killing Me Softly (2010)
2. Kill Me Again (2010)
3. Kiss Me, Kill Me (2010)

Portal Trilogy
Legacy of the Witch (2012)
1. Mark of the Witch (2012)
2. Daughter of the Spellcaster (2012)
3. Blood of the Sorceress (2013)

After Midnight (2000)
Paranormal Holiday Anthology Trio (2010) (with Lora Leigh and Nalini Singh)
The Heart of Winter (2011) (with Day Leclaire and Linda Winstead Jones)
Vacation With a Vampire...and Other Immortals (2011) (with Maureen Child)
The Bad Ass Brides Collection (2012)
The Witch Collection (2013)

Forgotten Vows (1994) (with Lindsay McKenna)
A Sprinkle of Fairy Dust (1996) (with Elizabeth Bevarly, Elaine Crawford and Marylyle Rogers)
Bewitched (1997) (with Lisa Higdon, Susan Krinard and Amy Saunders)
Moonglow (1998) (with Lindsay Longford, Angie Ray and Katherine Sutcliffe)
Silhouette Sensational: Forgotten Vows...? / license to Love / cowboy Daddy / babies On His Mind (1999) (with Barbara Boswell, Marie Ferrarella and Susan Mallery)
Veils of Time (1999) (with Lynn Kurland, Angie Ray and Ingrid Weaver)
Sinful: Unbuttoning Emmalina / Tangled Images / Sinderella / Leather and Lace (2000) (with Suzanne Forster, Lori Foster and Kimberly Randell)
Who Do You Love? (2000) (with Marilyn Pappano)
Witch Moon Rising / Witch Moon Waning (2001) (with Lorna Tedder)
Out of This World (2001) (with Laurell K Hamilton, Susan Krinard and J D Robb)
Broken Silence (2003) (with Eileen Wilks and Anne Marie Winston)
Hot Summer Nights (2003) (with Lindsay McKenna and Dallas Schulze)
Midnight Pleasures (2003) (with Amanda Ashley, Sherrilyn Kenyon and Ronda Thompson)
Pregnant with His Child (2004) (with Marilyn Pappano)
Danger in the Shadows (2004) (with Linda Turner)
Special Delivery (2004) (with Cathy Gillen Thacker)
Hot Blooded (2004) (with Christine Feehan, Emma Holly and Angela Knight)
Man of My Dreams (2004) (with Suzanne Forster, Virginia Kantra and Sherrilyn Kenyon)
Night's Edge (2004) (with Barbara Hambly and Charlaine Harris)
Burning Bright (2004) (with Judith Arnold and Anne Stuart)
An Unexpected Family (2004) (with Caroline Cross)
Kick Ass (2005) (with MaryJanice Davidson, Jacey Ford and Angela Knight)
Bewitched, Bothered and Bewildered (2005)
Passionate Secrets (2006) (with Barbara McCauley)
Sheer Pleasure (2007)
Wild Thing (2007) (with Meljean Brook, Alyssa Day and Marjorie M Liu)
Moon Fever (2007) (with Lori Handeland, Caridad Piñeiro and Susan Sizemore)
An Enchanted Season (2007) (with Jean Johnson, Erin McCarthy and Nalini Singh)
Weddings From Hell (2008) (with Jeaniene Frost, Terri Garey and Kathryn Smith)
Darkness Divine (2010) (with Rhyannon Byrd, P C Cast and Gena Showalter)
A Valentine from Harlequin: Six Degrees of Romance (2012) (with Christine Bell, Michele Hauf, Margaret Moore, Catherine Spencer and Nancy Warren)

Fortune's Children
7. A Husband in Time (1997)

Fortunes of Texas
1. Million Dollar Marriage (1999)

Family Secrets
1. Enemy Mind (2003)
Family Secrets: Books 1-4 (omnibus) (2007) (with Cindy Gerard, Evelyn Vaughn and Anne Marie Winston)