One Last Kill is a bestselling police procedural and mystery thriller by Robert Dugoni and is the tenth instalment in his critically acclaimed Tracy Crosswhite series.

Burned out by systemic department politics, Detective Tracy Crosswhite remains the sole member of Seattle’s Cold Case Unit. She is handed an assignment by the city’s corrupt Chief of Police, Marcella Weber: reopen the investigation into the notorious Route 99 serial killer.

After thirteen victims, he stopped hunting and the trail went cold, stirring public outrage. Now, nearly three decades after his first kill, Tracy is expected to finally bring closure to the victims’ families and redeem the Seattle PD’s reputation. Even if it means working with her nemesis, Captain Johnny Nolasco.

Lead detective of the original task force, Nolasco dares Tracy to do what he failed to: close the case. Forming an uneasy alliance, Tracy and Nolasco revisit old leads and pursue new evidence only to unearth high-level corruption and cover-ups as dangerous as the elusive killer himself. At the risk of being exposed, such deadly and powerful forces will go to extremes to stay in the shadows.

That’s just where Tracy and Nolasco are headed—to find the twisted truth behind a killer’s motives, his disappearance, and his chilling comeback.