The Cat Marsala Mystery series by Barbara D'Amato consists of 9 books, published between 1989 and 2001. The series begins with Hardball.
The Figueroa and Bennis series by Barbara D'Amato consists of 5 books, published between 1996 and 2004. The series begins with Killer.App.
The Gerritt De Graaf series by Barbara D'Amato consists of 2 books, starting in 2016. The series begins with The Eyes on Utopia Murders.