mostly, holiday paperback horror turned out to be that terrible boyfriend who wraps an Applebee’s coupon in a Tiffany’s box or slides a subscription to Ladies’ Home Journal into an iPhone case. Its savagely seasonal covers concealed a distinct lack of Christmas carnage inside. No enraged, fire-shrouded snowmen appear in Slumber Party. And not only are no evil elf-babies born in Christmas Babies (1991), but the novel takes place in February. In Florida.