Mary Deal 
The Howling Cliffs [EPUB ebook] 

Sara Mason joins in searching for Huxley’s MIA brother’s remains in the Vietnam jungle. She is joined by her friend Esmerelda.
Later in Hawaii, Sara learns that a six-year-old neighborhood girl had gone missing ten years earlier. Something odd is going on at the nearby forest cliffs; someone wants this cold case to stay cold.
But even after attempts are made on Sara’s life, she pushes on with the investigation and pursues the leads that take her on a path of danger. Can she solve the mystery of the Howling Cliffs?