Fact-loving Paige sets out to prove imaginative Penn wrong about mermaids in this third book in the mystery graphic novel chapter book series Paige Proves It!

Paige loves facts! She is constantly spouting information about everything and anything to anyone who will listen. Hot dogs were first sold at baseball games in the 1800s! Termites are insects with strong jaws made for eating and burrowing into wood. And the boy named Penn who lives next door to her is her friend.

On a visit to their local seaside park, Penn is convinced there has been a mermaid sighting, and Paige is determined—once again—to prove him wrong, one fact at a time.