The Hardy Boys (House on the Cliff / Secret of the Old Mill / Tower Treasure)

Firefly & Fern Summary

This classic collection brings together three thrilling mystery adventures featuring the Hardy Boys, Frank and Joe, as they use their detective skills to solve puzzling crimes in their hometown. Young readers will love following these resourceful brothers as they uncover clues, face unexpected dangers, and work together to catch the culprits—all while learning the value of persistence, teamwork, and quick thinking. Perfect for kids who enjoy puzzles and page-turning adventures that keep them guessing until the very end.