Books in the Factory series in order

When a middle-aged alcoholic is found brutally battered to death on a roadside in West London, the case is assigned to a nameless detective sergeant, a tough-talking cynic and fearless loner from the Department of Unexplained Deaths at the Factory police station.

An axe-wielding psychopath carves young Dora Suarez into pieces and smashes the head of Suarez's friend, an elderly woman. The unnamed narrator, a sergeant in the Metropolitan Police's Unexplained Deaths division, develops a fixation on the young woman whose murder he investigates and discovers that Suarez's death is more bizarre than suspected.