Acting Kozak starred in movies such as
The House on Sorority Row (1983),
Parenthood (1989),
Side Out (1990),
Arachnophobia (1990),
The Taking of Beverly Hills (1991),
Necessary Roughness (1991),
All I Want for Christmas (1991),
The Favor (1994),
Magic in the Water (1995),
Unforgivable (1996), and the soap operas
Texas (from November 1981 to December 1982 as Brette Wheeler),
Guiding Light (from 1983 to 1985 and a one-day voice-over in February 1990, as both Annabelle Sims Reardon and Annabelle's deceased mother, in 1983 flashbacks, Annie Sims) and
Santa Barbara (from 1985 to 1986 and again in 1989, as former nun, Mary Duvall McCormick). In
Santa Barbara, her character died in an accident where a giant neon letter "C" toppled onto her during an argument atop the Capwell hotel. Viewers were so angry over Mary's death that they started a letter-writing campaign demanding for her reappearance. The show received such a huge number of letters that eventually they admitted their mistake and asked Kozak to come back. She declined the offer since she was already working with other projects and she was proud of the unusual way her character had made her exit. In February 1989, though, she made a brief return as an angel in Heaven. In 1987 Harley received a
Soap Opera Digest Award from her role as Mary. The role went to
Susanna Thompson. Also in 1996, Kozak portrayed a
battered wife in a made-for-TV movie,
Unforgivable, co-starring with
John Ritter, and received praise for her "strong" performance. Kozak also appeared in "Cold Lazarus", a first-season episode of
Stargate SG-1, as Sara O'Neill.
Writing Kozak has written five novels:
Dating Dead Men (2004),
Dating Is Murder : A Novel (2005),
Dead Ex (2007), and ''A Date You Can't Refuse
(2008), all of which feature greeting-card designer and amateur sleuth Wollie Shelley, a woman with very eccentric friends and family. The first three novels were published by Doubleday, a division of Random House, and the most recent was published by Broadway Books following the restructuring of Doubleday. Dating Dead Men'' won an Agatha Award, an Anthony Award, and a Macavity Award for best first novel. Kozak's fifth book is
Keeper of the Moon, a paranormal romantic suspense novel. ==Personal life==