Karen Robards
Jessica Ford, a young attorney surviving the death of the First Lady in a car crash, and Secret Service agent Mark Ryan, in Washington, DC:

Pursuit (2009)

Justice (2011)

Dr. Charlotte “Charlie” Stone, an expert in criminal pathology who can communicate with the newly dead:

The Last Victim (2012)

The Last Kiss Goodbye (2013)

Her Last Whisper (2014)

The Last Time I Saw Her (2015)

Bianca St. Ives, running a multinational firm with her father, and swindling con men out of their money, in the Guardian thriller series:

The Ultimatum (2017)

The Moscow Deception (2018)

The Fifth Doctrine (due March 19, 2019)

Non-series romantic suspense:

Night Magic (1987)

One Summer (1993)

Hunter’s Moon (1995)

Walking After Midnight (1995)

Heartbreaker (1996)

The Senator’s Wife (1998)

The Midnight Hour (1999)

Ghost Moon (2000)

Paradise County (2000)

To Trust a Stranger (2001)

Beachcomber (2003)

Whispers at Midnight (2003)

Bait (2004)

Superstition (2005)

Vanished (2006)

Obsession (2007)

Guilty (2008)

Shattered (2010)

Sleepwalker (2011)

Shiver (2012)

Hunted (2013)

Hush (2014)

Darkness (2016)