Book excerpt: Fifteen-year-old Samuel Scott died while building the Titanic. As the ship sails to her doom, his ghost moves restlessly alongside the passengers and crew: Frederick Fleet: the young look-out who spotted the iceberg and who survived in a life-boat with (the unsinkable) Molly Brown; Howard Hartley Wallace: the heroic band-leader who played ragtime music as the freezing waters lapped at his feet; Harold Bride: the junior radio operator whose messages echoed on, long after the ship had disappeared to its icy grave ...