Kristen Callihan has published 20 books, with an average book rating of 4.19 out of 5 stars. Quite a few books belong to the genre new adult and are set in contemporary times. The novels often feature alpha male protagonists.
A very well liked series by Kristen Callihan are the contemporary new adult Game On books, featuring athletes, alpha male, friends to lovers and sports tropes. A second much read series are the historical fantasy Darkest London novels, tagged as magic, victorian, steampunk and urban fantasy. The most popular books are Managed, The Friend Zone, The Game Plan and The Hook Up. Kristen Callihan's latest book is Exposed which was published in 2021.