In “Nemesis on the Niagara,” twelve-year-old Raisina Grape is visiting her grandparents near Niagara Falls, New York. The family vacation soon takes a sinister turn when a mysterious woman arrives in town. A shocking challenge will soon draw Raisina, her private detective mother, Violet, and her feisty eight-year- old sister, Amethyst, into a complex and perilous mystery that threatens to bring the state of New York to a halt. Join the Grapes as they navigate the wonderous and intriguing home of the most powerful waterfall in the world!