Told in their separate voices, twelve-year-olds Petra, who escaped her abusive father's Amsterdam house in 1663, and Bram, a half-Javanese/half-Dutch boy, relate their adventures at sea after Petra stows away and Bram, son of the ship's carpenter, helps her disguise herself as a boy. Interest Level: 5-8 Reading Level: 6.5 Lexile Measure: 760.