Deadly Intent by Lynda La Plante

Anna Travis returns in a gripping mystery by Lynda La Plante. Ruthless drug trafficker Alexander Fitzpatrick has been missing for ten years—either dead or cleverly hiding. When an ex-colleague from the murder squad is found shot in a drug den, Travis is pulled into the case. Distracted by the investigation after her breakup with DCI Langton, she becomes involved with someone new. As the body count rises, Travis and Langton must set aside their past and work together to catch one of the most cunning criminals they've faced.