Double Threat

In this third installment of the series, Harbor Police detectives Park and Walker are given separate high-stakes assignments. Park drives up to Los Angeles, where he joins forces with the FBI and works undercover on a cruise ship in pursuit of an unidentified serial killer. As he and his team peel back the layers of a far-reaching conspiracy, the term “rough seas” takes on a much deeper meaning. Back in San Diego, Walker becomes a member of MARTAC, the Harbor Police’s SWAT team, and he tackles a case of his own involving political assassination, white supremacy, and narcotics trafficking, with powerful enemies both old and new. Alternating chapters spotlight these two heroes until their stories converge in an appalling turn of events. Are Park and Walker the real double threat, or will the twin forces of evil they’re up against prove insurmountable? There’s only one way to find out!