Synopsis: From bestselling author Gordon Korman, the thrilling conclusion to the adventure aboard the unluckiest ship of all.The Titanic was supposed to be unsinkable - the largest passenger steamship in the world, one of the biggest and most luxurious ships ever to operate.For Paddy, Sophie, Juliana, and Alfie, the Titanic is full of mysteries - whether they're to be found in the opulent first-class cabins and promenade decks or the shadows in the…