Matthew J. Arlidge (born 1974) is an English author of crime novels starring DI Helen Grace.

Several more Helen Grace novels are scheduled for release in the UK and other international markets, including the US, Germany, Italy, The Netherlands, Norway and France.

A tough, determined police officer who rides a motorbike and prefers to travel through life alone, she nevertheless is beset by personal demons.

She neither drinks nor takes drugs, so expiates her dark moods through the controlled use of pain, administered to her by her loyal dominator, Jake.

She is assisted by a number of colleagues at Southampton Central, most notably her loyal friend, DS Charlene "Charlie" Brooks.