Book excerpt: 2.20am on 15th April 1912, the Titanic is plunging 12,000 feet to the ocean floor.Machinery, coal, crystal goblets, pianos and jewellery all tumbled through the dark water. Hundreds of passengers and crew remained trapped below decks – hundreds more would perish on the surface.This is the definitive chronology of the Titanic’s final hours, offering readers a real-time experience of one of the greatest dramas of twentieth century history.