Those monsters can't be stopped!It's bad enough that December Spenser's fourteenth annual Grandparents Cruise won't include the beloved grandmother Dessi never got a chance to say goodbye to. But now most of the cruise passengers have been turned to brainthirsty zombies, and Grams has risen with them. With help from Friday Goode, a nerdy teen monster-hunter, and Pepper, a service dog who can smell zombies a deck away, Dessi must fight the undead on a deteriorating cruise ship while working to find a cure. But will the U.S. military blow them out of the water before they even get close?