Charles Knief Books in Order

Retired naval officer John Caine lives aboard a sailboat in Oahu and investigates favors for friends. Asked to look into an admiral's daughter's brutal murder, he uncovers a dangerous connection to the production of violent pornography.

A wealthy widow hires John Caine to investigate her software-mogul husband's death and missing company funds. Following the trail from Hawaii through California into Mexico, Caine confronts violence, financial deception, and obstacles on both sides of the border.

John Caine rescues Margo Halliday from an armed pursuer in Honolulu. When her abusive former husband is murdered, she asks for protection from the killers, drawing Caine into a perilous chase involving stolen emeralds and ruthless enemies.

After a San Francisco shootout leaves John Caine wounded and facing a murder charge, he returns to Hawaii to recover. A scientist's underwater discovery presents another challenge, with professional betrayal and an erupting volcano threatening an extraordinary historical find.