The moon child

the long version

"Three months on from the shattering events in St Paul's, Jem has swapped kitchen drudgery for the life of a young gentleman. But when Ann is kidnapped, Jem and Tolly are catapulted back into a world of threat and evil. After experiencing a vision of Ann on board a ship, the pair stow away on The Fortuna, heading for the American colonies. But Ann is nowhere to be found on the ship. When crew members begin to go missing and strange and sinister things start happening on The Fortuna, Jem and Tolly realise they are in serious danger once more. What if Count Cazalon isn't really dead?"--Publisher description.