Samantha Saves the Day (American Girls Collection)

Samantha and her family are spending the summer at Piney Point, Grandmary's home in the mountains. One day Samantha and the twins, Agnes and Agatha, find a sketchbook made by Samantha's mother. In it, Samantha sees a beautiful waterfall she had visited with her parents long ago, before they died in a boating accident. Using the sketchbook as a map, Samantha and the twins set off. When their secret exploration puts them in the middle of a dangerous storm, Samantha must save the day.