Kozak has written four 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.Dating Dead Men won an Agatha Award for best first novel in 2004.
Kozak lives in Agoura Hills, California. She has been married twice: a brief union in the early 1980s (1982–1983) to actor Van Santvoord and a second marriage from 1997-2007 to an entertainment lawyer Gregory Aldisert. She has three children with her second husband: daughter Audrey Valentine (b. 9 March 2000) and twins Lorenzo Robert and Giana Julia (b. 30 May 2002).
After the birth of her children Kozak retired from acting almost completely and has devoted her time to her family and writing.