A captivating mystery for young readers that combines humor, adventure, and heartfelt moments—perfect for fans of the beloved classic Harriet the Spy.

This summer in the quiet beach town of Water Mill, Harriet M. Welsch and her friend Beth Ellen Hansen find their world turned upside down by a series of anonymous, disturbing notes left around town. Harriet, ever the curious and bold investigator, drags the shy Beth Ellen into a string of adventures as they seek to uncover the mystery writer's identity.

Observing in her own special, caustic way with her ever-present notebook, Harriet the Spy is on the case. But will she be ready to face the truth when she finds it?