Published in 1938, 'Third Warning: A Mystery Story for Girls' by Roy J. Snell follows Florence Huyler and Captain Davie on a summer cruise to Isle Royale. As they navigate Lake Superior, they face a series of emergencies, including a threatening forest fire that endangers both the island's beauty and the lives of campers. The story explores themes of adventure, responsibility, and bravery in the face of unexpected challenges, making it a notable entry in juvenile mystery literature.
