Death on the Royal Yacht

It's 1966 and Queen Elizabeth II is touring the Caribbean aboard the Royal Yacht Britannia. Her schedule is measured in ten-minute increments for five weeks, and nothing can afford to go wrong. But something does. Early in the trip, the Queen's new diary secretary, Pamela Sinclair, is found dead in her cabin. Rumours abound about how she died, but the truth is, nobody really knows. However, this time, suspicion falls on the Queen's longstanding confidante, Joan McGraw.