The Cat and a Playing Card series by Carole Nelson Douglas consists of 4 books, published between 1999 and 2000. The series begins with The Cat and the King of Clubs.
The Crystal Phoenix series by Carole Nelson Douglas consists of 2 books, starting in 1990. The series begins with Crystal Days.
The Delilah Street, Paranormal Investigator series by Carole Nelson Douglas consists of 6 books, published between 2007 and 2013. The series begins with Dancing With Werewolves.
The Irene Adler series by Carole Nelson Douglas consists of 9 books, published between 1990 and 2012. The series begins with Good Night, Mr. Holmes.
The Midnight Louie Cafe Noir Mystery series by Carole Nelson Douglas consists of 1 book, starting in 2018. The series begins with Absinthe Without Leave.
The Midnight Louie Short Stories/Novellas series by Carole Nelson Douglas consists of 1 book, starting in 2002. The series begins with White House Pet Detectives.
The Probe series by Carole Nelson Douglas consists of 2 books, published between 1985 and 1988. The series begins with Probe.
The Sword and Circlet series by Carole Nelson Douglas consists of 5 books, published between 1982 and 1989. The series begins with Six of Swords.
The Taliswoman Trilogy series by Carole Nelson Douglas consists of 2 books, published between 1991 and 1992. The series begins with Cup of Clay.