Fiction Pitt, Dirk (Fictitious character) Treasure troves Antiquities Brown tide History Invasions Marine biologists Marine engineers Mercenary troops Parent and adult child Ship captains Shipwrecks Terrorism Twins Adventure stories Cabrillo, Juan (Fictitious character) Collection and preservation Greenland Incas International relations Large type books Meteorites Missing persons Petroleum reserves Pitt, Dick (Fictitious character)--Fiction Political fiction Prevention Saline water conversion Smuggling