For decades, the British ocean liner the Queen Mary sailed the seas, first as a luxurious playground for the world's rich and famous, then as transportation for thousands of soldiers who were ready to risk their lives during World War II. Today, the liner serves as a hotel in California, but there may be mysterious ghostly guests still onboard. Readers will learn about the Queen Mary and its phantom passengers, regaling its glory days as a liner to its time as the "Gray Ghost" of World War II. Detailed sidebars and fact boxes provide extra insight into the ship's storied history.