Four adventurous friends dive into murder while celebrating the big five-oh . . . and another husband dies trying. Zelda Carlisle's birthday cruise in the Gal?pagos Islands is anything but a smooth sail. Plans go off the rails after she and her three best friends bump into a dead man on deck. When there is no body, there is no crime to ruin their fun, so they hide him and hope no one will notice he's missing. When their reckless deed lands them...