Love Spell
1. Second Chance (1994)

Rock Creek Six
1. Reese (2001)
3. Rico (2001)
5. Nate (2002)

Luchetti Brothers
1. The Daddy Quest (2003)
2. The Brother Quest (2004)
3. The Husband Quest (2004)
4. A Soldier's Quest (2005)
5. The Mommy Quest (2006)

Night Creature
Red Moon Rising (2004) (in Stroke of Midnight)
Charmed by the Moon (2006) (in My Big Fat Supernatural Wedding)
1. Blue Moon (2004)
2. Hunter's Moon (2005)
3. Dark Moon (2005)
4. Crescent Moon (2006)
5. Midnight Moon (2006)
6. Rising Moon (2007)
7. Hidden Moon (2007)
8. Thunder Moon (2008)
9. Marked By The Moon (2010)
10. Moon Cursed (2011)
11. Crave The Moon (2011)
Shadow of the Moon (2011)

Phoenix Chronicles
1. Any Given Doomsday (2008)
2. Doomsday Can Wait (2009)
3. Apocalypse Happens (2009)
4. Chaos Bites (2010)

Shakespeare Undead
1. Shakespeare Undead (2010)
2. Zombie Island (2012)

Trick or Treat (1997) (with Lark Eden, Stobie Piel and Lynda Trent)
The Farmer's Wife / Dreamless (2002)
Then He Kissed Her (2003) (with Kate Donovan and Julie Moffett)
Family of Her Own / Brother Quest (2004) (with Brenda Novak)
Stroke of Midnight (2004) (with Amanda Ashley, L A Banks and Sherrilyn Kenyon)
Wrong Man / Daddy Quest (2004) (with Laura Abbot)
Husband Quest / Operation - Texas (2004) (with Roxanne Rustand)
Dates from Hell (2006) (with Kelley Armstrong, Kim Harrison and Lynsay Sands)
Moon Fever (2007) (with Caridad Piñeiro, Maggie Shayne and Susan Sizemore)
No Rest for the Witches (2007) (with MaryJanice Davidson, Cheyenne McCray and Christine Warren)
Mothers of the Year (2008) (with Anna DeStefano and Rebecca Winters)

My Big Fat Supernatural Wedding (2006) (with L A Banks, Jim Butcher, Rachel Caine, P N Elrod, Esther Friesner, Charlaine Harris, Sherrilyn Kenyon and Susan Krinard)