The Last Passenger by Will Dean

A woman celebrating a new romance on a luxury cruise wakes to an impossible nightmare: the vast ship is deserted, the lifeboats are gone, the doors are sealed, and ominous clues suggest a meticulously orchestrated disappearance. Alone at sea with dwindling supplies and the clock ticking, she scavenges and problem-solves through the labyrinthine decks, decodes cryptic messages, and confronts the possibility of betrayal, racing to outwit whoever is pulling the strings before the vessel becomes her tomb.