The inheritance of her father's vast fortune and contact with a variety of people with suspicious motives trigger a series of attempts on Lucinda's life in her isolated island home, which is a stronghold of Spain within the boundaries of the United States.

Castle in the Sea 1984, Fawcett Books, New York, NY

ISBN-13: 9780449701232

Mass-market paperback

Castle in the Sea 1983, Houghton Mifflin, Boston, MA

ISBN-13: 9780395348314