Passage: Probably the most famous Swiss literary creation, Heidi, the story of an orphan girl who lives with her grandfather in the Alps, is one of the most popular children's books ever and has come to be a symbol of Switzerland. Her creator, Johanna Spyri (1827–1901), wrote a number of other books on similar themes.

Question: what is the name of the story that has an orphan girl?
Heidi