The Ryder Quartet comprises four crime thrillers. Each of them is also separately available as an independent book. In this collection they form an overall cohesive narrative. Detective Jeremy Ryder and his colleagues pursue heinous criminals into the depths of the criminal underworld. The action takes place in Durban, South Africa, but the confrontation between the forces of law and justice on the one hand and criminal machinations on the other make these four stories relevant to any major city in the world. The author's field work involved detective-guided tours through forensic analysis, to the front line of drug dealing, and into the private pain of victims of crime. Readers of the individual volumes have hailed the work as action-packed thrillers steeped in authenticity and plausibility, reflecting the real world of police encounters with the dark world of crime.