Death On The Diversion (Secret Sleuth, Book 1)

To the world, Sheila Mackey is author of a blockbuster book. Her wily great-aunt, the actual author, orchestrated this mutually beneficial masquerade. Now Sheila's ending 15 years of pretending with a transatlantic cruise. She should be thinking about what comes next, but discovers the ultimate distraction: finding a dead body on deck.