Columbia subject headings:
Harvard subject headings:
Action and adventure fiction
Adventure stories
Antiquities--Fiction.
Hypersonic planes, Military--Fiction.
Marine biologists--Fiction
Philippine Sea--Fiction.
Pitt, Dirk (Fictitious character)--Fiction.
Thrillers (Fiction)
Princeton subject headings:
Father and child--Fiction.
Hijacking of ships--Fiction.
Marine biologists--Fiction.
Missions--Fiction.
Pitt, Dirk (Fictitious character)--Fiction.
Religious articles--Fiction.
Underwater exploration--Fiction.