Robert Langdon Series

by Dan Brown

Thriller, with recurring themes of keys, codes, and symbols.
Robert Langdon is a professor of religious iconology and symbology at Harvard University.

1. Angels & Demons (2000)


2. The Da Vinci Code (2003)


3. The Lost Symbol (2009)

The author's website is here.

Monkeewrench Series

by P. J. Tracy

Contemporary mystery; crime fiction.
Monkeewrench is a group of software developers.

1. Monkeewrench (Published as Want to Play? in the UK)


2. Live Bait


3. Dead Run


4. Snow Blind


5. Shoot to Thrill

The website of the authors (a mother-daughter team) is here.