Leviathan - Ian Edington

1928, the world's largest ocean liner disappears on its maiden voyage to New York. Lost for years in a desolate mist-laden ocean, the passengers and crew try to maintain the routine of shipboard life. But when people start to be murdered, former cop Detective Sergeant Lament is tasked with solving the crime and his investigations take him from the first class cabins to the belly of the ship and the heart of its mysteries.
In 1928 the largest cruise liner the world has ever seen is launched. With a crew and passenger complement totalling nearly 30,000 people the Leviathan is bound for New York. However, it never reaches the Big Apple and simply... disappears!
Twenty years later - with the Leviathan stranded on an unearthly sea--Detective Sergeant Lament begins to investigate the mystery at the liner's heart. What he discovers will change his world forever--but it might just bring the Leviathan home...