DO NOT BECOME ALARMED by Maile Melody is a bit frightening. Now, I've never been on a cruise and not sure I want to go on one. Two couples decide to take a cruise with their children. They don't get off the ship at most stops but the one time another couple they meet on the cruise talk them into going zip lining. They never make it to zip line and go swimming instead but the tide changes and takes the kids downstream while no one is watching. And then.... read the book it's great.