Titanic. Book 3, S.O.S by Gordon Korman For Paddy, Sophie, Juliana, and Alfie, the Titanic is full of mysteries. They're to be found in the opulent first-class cabins and promenade decks or the shadows in the underbelly of the ship. Secrets and plans are about to be revealed, and time is running out. The four of them need to find the truth, unmask the killer, and try not to go down with the ship.