In this third chapter book starring Rafi and Rosi, the two tree frog siblings explore their island home of Puerto Rico and learn about its Spanish history, fortresses, and pirates.

In this new book in the popular Dive Into Reading: Rafi and Rosi chapter book series, Rafi and his younger sister, Rosi, are excited to visit El Morro Fort, the four-hundred-year-old fortress that guards the entrance to San Juan harbor. At the fort they pretend to be pirates, engage in a fierce battle, and learn about Roberto Cofres