The Vampirates - La serie de libros

The year is 2512 and the Tempest twins, Grace and Connor, decide to leave their small town of Crescent Moon Bay after their father's death. They take their boat out into the ocean in the middle of a horrible storm and they become shipwrecked. Rescued by different passing ships, they have chosen different paths and loyalties, but will they ever find each other again, or is it too late?