Samantha Spinner and the Super-Secret Plans is a children's mystery novel centered on an eponymous character, Samantha, an 11-year-old from Seattle. Her uncle Paul disappeared mysteriously and left her siblings expensive gifts. Her brother, Nipper, received the New York Yankees. Her sister, Buffy, received $2,400,000,000. Samantha received only a rusty red umbrella. Eventually, she discovered that the umbrella lining contains maps and diagrams to secret means of traveling around the globe. The story uses Samantha's brother Nipper as a device to add educational content to the story.