PJ Quinn is the pen name of mother and daughter team Pauline Kirk and Jo Summers. Jo challenged her mother to write a crime novel and, somehow, ended up writing it with her. The result is a series of detective novels featuring DI Ambrose and Chalk Heath, set in the late 1950s, a period of great change that seems like an era ago. Foul Play is the first novel, followed by Poison Pen and Close Disharmony. Their fourth collaboration, Poetic Justice, was published in 2018.

An extended second edition of Foul Play was published in 2020 developing the character of WPC Meadows in anticipation of the fifth novel in the series, Skull Days, expected in the Autumn of 2023.